66167522155620 has 72 divisors (see below), whose sum is σ = 201276729062136. Its totient is φ = 17594687649792.

The previous prime is 66167522155613. The next prime is 66167522155633. The reversal of 66167522155620 is 2655122576166.

66167522155620 is a `hidden beast` number, since 6 + 6 + 1 + 6 + 7 + 5 + 2 + 2 + 1 + 5 + 5 + 620 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10220144034816 + 55947378120804 = 3196896^2 + 7479798^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 520612587 + ... + 520739666.

It is an arithmetic number, because the mean of its divisors is an integer number (2795510125863).

Almost surely, 2^{66167522155620} is an apocalyptic number.

66167522155620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66167522155620 is an abundant number, since it is smaller than the sum of its proper divisors (135109206906516).

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

66167522155620 is a wasteful number, since it uses less digits than its factorization.

66167522155620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041352621 (or 1041352616 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 66167522155620 in words is "sixty-six trillion, one hundred sixty-seven billion, five hundred twenty-two million, one hundred fifty-five thousand, six hundred twenty".