656571427 has 8 divisors (see below), whose sum is σ = 658930064. Its totient is φ = 654218208.

The previous prime is 656571403. The next prime is 656571439. The reversal of 656571427 is 724175656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 656571427 - 2⁷ = 656571299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656571497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540673 + ... + 541885.

It is an arithmetic number, because the mean of its divisors is an integer number (82366258).

Almost surely, 2^656571427 is an apocalyptic number.

656571427 is a deficient number, since it is larger than the sum of its proper divisors (2358637).

656571427 is a wasteful number, since it uses less digits than its factorization.

656571427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2709.

The product of its digits is 352800, while the sum is 43.

The square root of 656571427 is about 25623.6497595483. The cubic root of 656571427 is about 869.1485160092.

The spelling of 656571427 in words is "six hundred fifty-six million, five hundred seventy-one thousand, four hundred twenty-seven".