66940372296 has 64 divisors (see below), whose sum is σ = 212509123200. Its totient is φ = 19125820224.

The previous prime is 66940372283. The next prime is 66940372309. The reversal of 66940372296 is 69227304966.

66940372296 is a `hidden beast` number, since 6 + 6 + 9 + 403 + 7 + 229 + 6 = 666.

66940372296 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66940372283) and next prime (66940372309).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22134855 + ... + 22137878.

It is an arithmetic number, because the mean of its divisors is an integer number (3320455050).

Almost surely, 2^66940372296 is an apocalyptic number.

It is an amenable number.

66940372296 is an abundant number, since it is smaller than the sum of its proper divisors (145568750904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66940372296 is a wasteful number, since it uses less digits than its factorization.

66940372296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44272755 (or 44272745 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 54.

The spelling of 66940372296 in words is "sixty-six billion, nine hundred forty million, three hundred seventy-two thousand, two hundred ninety-six".