77666166 has 24 divisors (see below), whose sum is σ = 178176024. Its totient is φ = 24365760.

The previous prime is 77666159. The next prime is 77666179. The reversal of 77666166 is 66166677.

It is a super-2 number, since 2×77666166² = 12064066682279112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126600 + ... + 127211.

It is an arithmetic number, because the mean of its divisors is an integer number (7424001).

Almost surely, 2^77666166 is an apocalyptic number.

77666166 is an abundant number, since it is smaller than the sum of its proper divisors (100509858).

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

77666166 is a wasteful number, since it uses less digits than its factorization.

77666166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253836 (or 253833 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 77666166 is about 8812.8409721270. The cubic root of 77666166 is about 426.6554414636.

The spelling of 77666166 in words is "seventy-seven million, six hundred sixty-six thousand, one hundred sixty-six".