677744407 has 4 divisors (see below), whose sum is σ = 679755856. Its totient is φ = 675732960.

The previous prime is 677744363. The next prime is 677744411. The reversal of 677744407 is 704447776.

It is a happy number.

677744407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677744407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677744437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005219 + ... + 1005892.

It is an arithmetic number, because the mean of its divisors is an integer number (169938964).

Almost surely, 2^677744407 is an apocalyptic number.

677744407 is a deficient number, since it is larger than the sum of its proper divisors (2011449).

677744407 is a wasteful number, since it uses less digits than its factorization.

677744407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011448.

The product of its (nonzero) digits is 921984, while the sum is 46.

The square root of 677744407 is about 26033.5246749264. The cubic root of 677744407 is about 878.3925575644.

The spelling of 677744407 in words is "six hundred seventy-seven million, seven hundred forty-four thousand, four hundred seven".