677816161 has 4 divisors (see below), whose sum is σ = 739435824. Its totient is φ = 616196500.

The previous prime is 677816143. The next prime is 677816177. The reversal of 677816161 is 161618776.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 677816161 - 2⁷ = 677816033 is a prime.

It is a super-2 number, since 2×677816161² = 918869496225555842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677816261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30809815 + ... + 30809836.

It is an arithmetic number, because the mean of its divisors is an integer number (184858956).

Almost surely, 2^677816161 is an apocalyptic number.

It is an amenable number.

677816161 is a deficient number, since it is larger than the sum of its proper divisors (61619663).

677816161 is a wasteful number, since it uses less digits than its factorization.

677816161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61619662.

The product of its digits is 84672, while the sum is 43.

The square root of 677816161 is about 26034.9027461214. The cubic root of 677816161 is about 878.4235554621.

The spelling of 677816161 in words is "six hundred seventy-seven million, eight hundred sixteen thousand, one hundred sixty-one".