66505051500 has 48 divisors (see below), whose sum is σ = 193662714336. Its totient is φ = 17734680000.

The previous prime is 66505051477. The next prime is 66505051541. The reversal of 66505051500 is 515050566.

66505051500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22166851 + ... + 22169850.

It is an arithmetic number, because the mean of its divisors is an integer number (4034639882).

Almost surely, 2^66505051500 is an apocalyptic number.

66505051500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66505051500 is an abundant number, since it is smaller than the sum of its proper divisors (127157662836).

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

66505051500 is a wasteful number, since it uses less digits than its factorization.

66505051500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44336723 (or 44336711 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The spelling of 66505051500 in words is "sixty-six billion, five hundred five million, fifty-one thousand, five hundred".