66150661060020 has 192 divisors, whose sum is σ = 186404235623424. Its totient is φ = 17527998136320.

The previous prime is 66150661059809. The next prime is 66150661060037. The reversal of 66150661060020 is 2006016605166.

It is a congruent number.

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, 9610727499 + ... + 9610734381.

It is an arithmetic number, because the mean of its divisors is an integer number (970855393872).

Almost surely, 2^{66150661060020} is an apocalyptic number.

66150661060020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66150661060020 is an abundant number, since it is smaller than the sum of its proper divisors (120253574563404).

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

66150661060020 is a wasteful number, since it uses less digits than its factorization.

66150661060020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8702 (or 8700 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

Adding to 66150661060020 its reverse (2006016605166), we get a palindrome (68156677665186).

The spelling of 66150661060020 in words is "sixty-six trillion, one hundred fifty billion, six hundred sixty-one million, sixty thousand, twenty".