677166965 has 16 divisors (see below), whose sum is σ = 841434480. Its totient is φ = 522547200.

The previous prime is 677166961. The next prime is 677166977. The reversal of 677166965 is 569661776.

It can be written as a sum of positive squares in 8 ways, for example, as 269813476 + 407353489 = 16426^2 + 20183^2 .

It is not a de Polignac number, because 677166965 - 2² = 677166961 is a prime.

It is a super-2 number, since 2×677166965² = 917110196974622450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677166961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230687 + ... + 233603.

It is an arithmetic number, because the mean of its divisors is an integer number (52589655).

Almost surely, 2^677166965 is an apocalyptic number.

It is an amenable number.

677166965 is a deficient number, since it is larger than the sum of its proper divisors (164267515).

677166965 is a wasteful number, since it uses less digits than its factorization.

677166965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4552.

The product of its digits is 2857680, while the sum is 53.

The square root of 677166965 is about 26022.4319578321. The cubic root of 677166965 is about 878.1430215692.

The spelling of 677166965 in words is "six hundred seventy-seven million, one hundred sixty-six thousand, nine hundred sixty-five".