66305772188040 has 256 divisors, whose sum is σ = 248006966814720. Its totient is φ = 13777480765440.

The previous prime is 66305772187999. The next prime is 66305772188057. The reversal of 66305772188040 is 4088127750366.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 568635984 + ... + 568752576.

It is an arithmetic number, because the mean of its divisors is an integer number (968777214120).

Almost surely, 2^{66305772188040} is an apocalyptic number.

66305772188040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66305772188040 is an abundant number, since it is smaller than the sum of its proper divisors (181701194626680).

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

66305772188040 is a wasteful number, since it uses less digits than its factorization.

66305772188040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178172 (or 178168 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 66305772188040 in words is "sixty-six trillion, three hundred five billion, seven hundred seventy-two million, one hundred eighty-eight thousand, forty".