677155551 has 16 divisors (see below), whose sum is σ = 914880096. Its totient is φ = 445469696.

The previous prime is 677155541. The next prime is 677155553. The reversal of 677155551 is 155551776.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 677155551 - 2⁶ = 677155487 is a prime.

It is a super-2 number, since 2×677155551² = 917079280500227202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677155553) 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, 74701 + ... + 83273.

It is an arithmetic number, because the mean of its divisors is an integer number (57180006).

Almost surely, 2^677155551 is an apocalyptic number.

677155551 is a deficient number, since it is larger than the sum of its proper divisors (237724545).

677155551 is a wasteful number, since it uses less digits than its factorization.

677155551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8922.

The product of its digits is 183750, while the sum is 42.

The square root of 677155551 is about 26022.2126461222. The cubic root of 677155551 is about 878.1380876897.

The spelling of 677155551 in words is "six hundred seventy-seven million, one hundred fifty-five thousand, five hundred fifty-one".