666067247999 has 4 divisors (see below), whose sum is σ = 667493516664. Its totient is φ = 664640979336.

The previous prime is 666067247977. The next prime is 666067248023. The reversal of 666067247999 is 999742760666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 666067247999 - 2²⁸ = 665798812543 is a prime.

It is a super-2 number, since 2×666067247999² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666067247959) 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, 713133632 + ... + 713134565.

It is an arithmetic number, because the mean of its divisors is an integer number (166873379166).

Almost surely, 2^666067247999 is an apocalyptic number.

666067247999 is a deficient number, since it is larger than the sum of its proper divisors (1426268665).

666067247999 is a wasteful number, since it uses less digits than its factorization.

666067247999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426268664.

The product of its (nonzero) digits is 370355328, while the sum is 71.

The spelling of 666067247999 in words is "six hundred sixty-six billion, sixty-seven million, two hundred forty-seven thousand, nine hundred ninety-nine".