77672155 has 8 divisors (see below), whose sum is σ = 101679984. Its totient is φ = 56488800.

The previous prime is 77672141. The next prime is 77672159. The reversal of 77672155 is 55127677.

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

It is not a de Polignac number, because 77672155 - 2⁷ = 77672027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77672159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 706056 + ... + 706165.

It is an arithmetic number, because the mean of its divisors is an integer number (12709998).

Almost surely, 2^77672155 is an apocalyptic number.

77672155 is a deficient number, since it is larger than the sum of its proper divisors (24007829).

77672155 is a wasteful number, since it uses less digits than its factorization.

77672155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412237.

The product of its digits is 102900, while the sum is 40.

The square root of 77672155 is about 8813.1807538482. The cubic root of 77672155 is about 426.6664079453. Note that the first 3 decimals are identical.

The spelling of 77672155 in words is "seventy-seven million, six hundred seventy-two thousand, one hundred fifty-five".