66736740667407 has 8 divisors (see below), whose sum is σ = 88982650608384. Its totient is φ = 44490995585688.

The previous prime is 66736740667393. The next prime is 66736740667409. The reversal of 66736740667407 is 70476604763766.

66736740667407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66736740667407 - 2⁸ = 66736740667151 is a prime.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66736740667409) 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 7 ways as a sum of consecutive naturals, for example, 40267143 + ... + 41891720.

It is an arithmetic number, because the mean of its divisors is an integer number (11122831326048).

Almost surely, 2^{66736740667407} is an apocalyptic number.

66736740667407 is a deficient number, since it is larger than the sum of its proper divisors (22245909940977).

66736740667407 is a wasteful number, since it uses less digits than its factorization.

66736740667407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82429629.

The product of its (nonzero) digits is 896168448, while the sum is 69.

The spelling of 66736740667407 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred forty million, six hundred sixty-seven thousand, four hundred seven".