677181157 has 8 divisors (see below), whose sum is σ = 723057984. Its totient is φ = 632673888.

The previous prime is 677181137. The next prime is 677181161. The reversal of 677181157 is 751181776.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 677181157 - 2²³ = 668792549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677181107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341368 + ... + 343345.

It is an arithmetic number, because the mean of its divisors is an integer number (90382248).

Almost surely, 2^677181157 is an apocalyptic number.

It is an amenable number.

677181157 is a deficient number, since it is larger than the sum of its proper divisors (45876827).

677181157 is a wasteful number, since it uses less digits than its factorization.

677181157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684779.

The product of its digits is 82320, while the sum is 43.

The square root of 677181157 is about 26022.7046442141. The cubic root of 677181157 is about 878.1491562053.

The spelling of 677181157 in words is "six hundred seventy-seven million, one hundred eighty-one thousand, one hundred fifty-seven".