677720418 has 16 divisors (see below), whose sum is σ = 1374532416. Its totient is φ = 222724880.

The previous prime is 677720413. The next prime is 677720429. The reversal of 677720418 is 814027776.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 677720418.

It is not an unprimeable number, because it can be changed into a prime (677720413) 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, 795021 + ... + 795872.

It is an arithmetic number, because the mean of its divisors is an integer number (85908276).

Almost surely, 2^677720418 is an apocalyptic number.

677720418 is an abundant number, since it is smaller than the sum of its proper divisors (696811998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

677720418 is a wasteful number, since it uses less digits than its factorization.

677720418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590969.

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 677720418 is about 26033.0639380001. The cubic root of 677720418 is about 878.3821937716.

It can be divided in two parts, 67 and 7720418, that added together give a triangular number (7720485 = T₃₉₂₉).

The spelling of 677720418 in words is "six hundred seventy-seven million, seven hundred twenty thousand, four hundred eighteen".