66167152556768 has 48 divisors (see below), whose sum is σ = 131108451621840. Its totient is φ = 32870456626176.

The previous prime is 66167152556737. The next prime is 66167152556797. The reversal of 66167152556768 is 86765525176166.

It is a super-2 number, since 2×66167152556768² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7684283 + ... + 13834106.

It is an arithmetic number, because the mean of its divisors is an integer number (2731426075455).

Almost surely, 2^{66167152556768} is an apocalyptic number.

It is an amenable number.

66167152556768 is a deficient number, since it is larger than the sum of its proper divisors (64941299065072).

66167152556768 is a wasteful number, since it uses less digits than its factorization.

66167152556768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21519019 (or 21519011 counting only the distinct ones).

The product of its digits is 762048000, while the sum is 71.

The spelling of 66167152556768 in words is "sixty-six trillion, one hundred sixty-seven billion, one hundred fifty-two million, five hundred fifty-six thousand, seven hundred sixty-eight".