66415022838 has 12 divisors (see below), whose sum is σ = 143899216188. Its totient is φ = 22138340940.

The previous prime is 66415022837. The next prime is 66415022857. The reversal of 66415022838 is 83822051466.

66415022838 is a `hidden beast` number, since 6 + 6 + 415 + 0 + 228 + 3 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 66415022793 and 66415022802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66415022837) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1844861728 + ... + 1844861763.

It is an arithmetic number, because the mean of its divisors is an integer number (11991601349).

Almost surely, 2^66415022838 is an apocalyptic number.

66415022838 is an abundant number, since it is smaller than the sum of its proper divisors (77484193350).

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

66415022838 is a wasteful number, since it uses less digits than its factorization.

66415022838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3689723499 (or 3689723496 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 66415022838 in words is "sixty-six billion, four hundred fifteen million, twenty-two thousand, eight hundred thirty-eight".