656477 has 4 divisors (see below), whose sum is σ = 660576. Its totient is φ = 652380.

The previous prime is 656471. The next prime is 656479. The reversal of 656477 is 774656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 656477 - 2⁸ = 656221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 656477.

It is not an unprimeable number, because it can be changed into a prime (656471) 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, 1799 + ... + 2132.

It is an arithmetic number, because the mean of its divisors is an integer number (165144).

2⁶⁵⁶⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

656477 is a deficient number, since it is larger than the sum of its proper divisors (4099).

656477 is a wasteful number, since it uses less digits than its factorization.

656477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098.

The product of its digits is 35280, while the sum is 35.

The square root of 656477 is about 810.2326826289. The cubic root of 656477 is about 86.9106847518.

The spelling of 656477 in words is "six hundred fifty-six thousand, four hundred seventy-seven".