66304875554 has 16 divisors (see below), whose sum is σ = 99987972480. Its totient is φ = 32975604480.

The previous prime is 66304875523. The next prime is 66304875563. The reversal of 66304875554 is 45557840366.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66304875496 and 66304875505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4559507 + ... + 4574025.

It is an arithmetic number, because the mean of its divisors is an integer number (6249248280).

Almost surely, 2^66304875554 is an apocalyptic number.

66304875554 is a deficient number, since it is larger than the sum of its proper divisors (33683096926).

66304875554 is a wasteful number, since it uses less digits than its factorization.

66304875554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26545.

The product of its (nonzero) digits is 12096000, while the sum is 53.

The spelling of 66304875554 in words is "sixty-six billion, three hundred four million, eight hundred seventy-five thousand, five hundred fifty-four".