66342036731 has 32 divisors (see below), whose sum is σ = 71952384000. Its totient is φ = 61024803840.

The previous prime is 66342036707. The next prime is 66342036773. The reversal of 66342036731 is 13763024366.

It is a cyclic number.

It is not a de Polignac number, because 66342036731 - 2²² = 66337842427 is a prime.

It is a super-2 number, since 2×66342036731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66342036331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17351486 + ... + 17355308.

It is an arithmetic number, because the mean of its divisors is an integer number (2248512000).

Almost surely, 2^66342036731 is an apocalyptic number.

66342036731 is a deficient number, since it is larger than the sum of its proper divisors (5610347269).

66342036731 is a wasteful number, since it uses less digits than its factorization.

66342036731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179.

The product of its (nonzero) digits is 326592, while the sum is 41.

The spelling of 66342036731 in words is "sixty-six billion, three hundred forty-two million, thirty-six thousand, seven hundred thirty-one".