66596820731507 has 8 divisors (see below), whose sum is σ = 72778759202160. Its totient is φ = 60436162600960.

The previous prime is 66596820731479. The next prime is 66596820731533. The reversal of 66596820731507 is 70513702869566.

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

It is a cyclic number.

It is not a de Polignac number, because 66596820731507 - 2¹⁴ = 66596820715123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66596820731587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5320078478 + ... + 5320090995.

It is an arithmetic number, because the mean of its divisors is an integer number (9097344900270).

Almost surely, 2^{66596820731507} is an apocalyptic number.

66596820731507 is a deficient number, since it is larger than the sum of its proper divisors (6181938470653).

66596820731507 is a wasteful number, since it uses less digits than its factorization.

66596820731507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10640170053.

The product of its (nonzero) digits is 114307200, while the sum is 65.

The spelling of 66596820731507 in words is "sixty-six trillion, five hundred ninety-six billion, eight hundred twenty million, seven hundred thirty-one thousand, five hundred seven".