677743641 has 24 divisors (see below), whose sum is σ = 1037676744. Its totient is φ = 424788480.

The previous prime is 677743637. The next prime is 677743657. The reversal of 677743641 is 146347776.

It can be written as a sum of positive squares in 4 ways, for example, as 415303641 + 262440000 = 20379^2 + 16200^2 .

It is not a de Polignac number, because 677743641 - 2² = 677743637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (677743681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187471 + ... + 191051.

It is an arithmetic number, because the mean of its divisors is an integer number (43236531).

Almost surely, 2^677743641 is an apocalyptic number.

It is an amenable number.

677743641 is a deficient number, since it is larger than the sum of its proper divisors (359933103).

677743641 is a wasteful number, since it uses less digits than its factorization.

677743641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4841 (or 4838 counting only the distinct ones).

The product of its digits is 592704, while the sum is 45.

The square root of 677743641 is about 26033.5099631225. The cubic root of 677743641 is about 878.3922266387.

The spelling of 677743641 in words is "six hundred seventy-seven million, seven hundred forty-three thousand, six hundred forty-one".