66920042154 has 48 divisors (see below), whose sum is σ = 157440931200. Its totient is φ = 18905173056.

The previous prime is 66920042129. The next prime is 66920042171. The reversal of 66920042154 is 45124002966.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1252594 + ... + 1304925.

It is an arithmetic number, because the mean of its divisors is an integer number (3280019400).

Almost surely, 2^66920042154 is an apocalyptic number.

66920042154 is an abundant number, since it is smaller than the sum of its proper divisors (90520889046).

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

66920042154 is a wasteful number, since it uses less digits than its factorization.

66920042154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2557627 (or 2557620 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 66920042154 in words is "sixty-six billion, nine hundred twenty million, forty-two thousand, one hundred fifty-four".