66907693914 has 32 divisors (see below), whose sum is σ = 134432331264. Its totient is φ = 22199878320.

The previous prime is 66907693913. The next prime is 66907693927. The reversal of 66907693914 is 41939670966.

It is not an unprimeable number, because it can be changed into a prime (66907693913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2020777 + ... + 2053619.

It is an arithmetic number, because the mean of its divisors is an integer number (4201010352).

Almost surely, 2^66907693914 is an apocalyptic number.

66907693914 is an abundant number, since it is smaller than the sum of its proper divisors (67524637350).

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

66907693914 is a wasteful number, since it uses less digits than its factorization.

66907693914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34402.

The product of its (nonzero) digits is 13226976, while the sum is 60.

The spelling of 66907693914 in words is "sixty-six billion, nine hundred seven million, six hundred ninety-three thousand, nine hundred fourteen".