66963140931 has 32 divisors (see below), whose sum is σ = 90236805120. Its totient is φ = 44169494400.

The previous prime is 66963140891. The next prime is 66963140939. The reversal of 66963140931 is 13904136966.

66963140931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66963140931 - 2¹⁷ = 66963009859 is a prime.

It is a super-2 number, since 2×66963140931² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66963140939) 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, 139797550 + ... + 139798028.

It is an arithmetic number, because the mean of its divisors is an integer number (2819900160).

Almost surely, 2^66963140931 is an apocalyptic number.

66963140931 is a deficient number, since it is larger than the sum of its proper divisors (23273664189).

66963140931 is a wasteful number, since it uses less digits than its factorization.

66963140931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587.

The product of its (nonzero) digits is 629856, while the sum is 48.

The spelling of 66963140931 in words is "sixty-six billion, nine hundred sixty-three million, one hundred forty thousand, nine hundred thirty-one".