66415022858 has 16 divisors (see below), whose sum is σ = 103210082280. Its totient is φ = 32015046336.

The previous prime is 66415022857. The next prime is 66415022881. The reversal of 66415022858 is 85822051466.

It can be written as a sum of positive squares in 4 ways, for example, as 63815348689 + 2599674169 = 252617^2 + 50987^2 .

It is a super-2 number, since 2×66415022858² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66415022857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 806441 + ... + 884972.

Almost surely, 2^66415022858 is an apocalyptic number.

66415022858 is a deficient number, since it is larger than the sum of its proper divisors (36795059422).

66415022858 is a wasteful number, since it uses less digits than its factorization.

66415022858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692121.

The product of its (nonzero) digits is 921600, while the sum is 47.

The spelling of 66415022858 in words is "sixty-six billion, four hundred fifteen million, twenty-two thousand, eight hundred fifty-eight".