677780618 has 16 divisors (see below), whose sum is σ = 1037197320. Its totient is φ = 332107776.

The previous prime is 677780591. The next prime is 677780641. The reversal of 677780618 is 816087776.

It can be written as a sum of positive squares in 4 ways, for example, as 550700089 + 127080529 = 23467^2 + 11273^2 .

It is a super-2 number, since 2×677780618² = 918773132272923848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8138 + ... + 37706.

Almost surely, 2^677780618 is an apocalyptic number.

677780618 is a deficient number, since it is larger than the sum of its proper divisors (359416702).

677780618 is a wasteful number, since it uses less digits than its factorization.

677780618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29801.

The product of its (nonzero) digits is 790272, while the sum is 50.

The square root of 677780618 is about 26034.2201342771. The cubic root of 677780618 is about 878.4082010754.

The spelling of 677780618 in words is "six hundred seventy-seven million, seven hundred eighty thousand, six hundred eighteen".