66455159904 has 72 divisors (see below), whose sum is σ = 215979276240. Its totient is φ = 18987187968.

The previous prime is 66455159899. The next prime is 66455159929. The reversal of 66455159904 is 40995155466.

66455159904 is a `hidden beast` number, since 6 + 6 + 45 + 5 + 1 + 599 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16479919 + ... + 16483950.

It is an arithmetic number, because the mean of its divisors is an integer number (2999712170).

Almost surely, 2^66455159904 is an apocalyptic number.

It is an amenable number.

66455159904 is an abundant number, since it is smaller than the sum of its proper divisors (149524116336).

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

66455159904 is a wasteful number, since it uses less digits than its factorization.

66455159904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32963892 (or 32963881 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 66455159904 in words is "sixty-six billion, four hundred fifty-five million, one hundred fifty-nine thousand, nine hundred four".