677239866 has 40 divisors (see below), whose sum is σ = 1527758100. Its totient is φ = 224223552.

The previous prime is 677239861. The next prime is 677239867. The reversal of 677239866 is 668932776.

It can be written as a sum of positive squares in 2 ways, for example, as 651015225 + 26224641 = 25515^2 + 5121^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (677239861) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10110 + ... + 38166.

Almost surely, 2^677239866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 677239866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (763879050).

677239866 is an abundant number, since it is smaller than the sum of its proper divisors (850518234).

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

677239866 is a wasteful number, since it uses less digits than its factorization.

677239866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28220 (or 28211 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The square root of 677239866 is about 26023.8326539347. The cubic root of 677239866 is about 878.1745328560.

The spelling of 677239866 in words is "six hundred seventy-seven million, two hundred thirty-nine thousand, eight hundred sixty-six".