66674006740069 has 4 divisors (see below), whose sum is σ = 66849927602560. Its totient is φ = 66498085877580.

The previous prime is 66674006740057. The next prime is 66674006740087. The reversal of 66674006740069 is 96004760047666.

It is a happy number.

66674006740069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66674006740069 - 2²³ = 66673998351461 is a prime.

It is a super-2 number, since 2×66674006740069² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66674006739989 and 66674006740016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66674006740009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87960430677 + ... + 87960431434.

It is an arithmetic number, because the mean of its divisors is an integer number (16712481900640).

Almost surely, 2^{66674006740069} is an apocalyptic number.

It is an amenable number.

66674006740069 is a deficient number, since it is larger than the sum of its proper divisors (175920862491).

66674006740069 is a wasteful number, since it uses less digits than its factorization.

66674006740069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175920862490.

The product of its (nonzero) digits is 54867456, while the sum is 61.

The spelling of 66674006740069 in words is "sixty-six trillion, six hundred seventy-four billion, six million, seven hundred forty thousand, sixty-nine".