66626610120 has 192 divisors, whose sum is σ = 262027509120. Its totient is φ = 14333110272.

The previous prime is 66626610101. The next prime is 66626610163. The reversal of 66626610120 is 2101662666.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 734782 + ... + 820461.

It is an arithmetic number, because the mean of its divisors is an integer number (1364726610).

Almost surely, 2^66626610120 is an apocalyptic number.

66626610120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66626610120 is an abundant number, since it is smaller than the sum of its proper divisors (195400899000).

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

66626610120 is a wasteful number, since it uses less digits than its factorization.

66626610120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555284 (or 1555277 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 66626610120 in words is "sixty-six billion, six hundred twenty-six million, six hundred ten thousand, one hundred twenty".