656554261 has 4 divisors (see below), whose sum is σ = 716241024. Its totient is φ = 596867500.

The previous prime is 656554259. The next prime is 656554267. The reversal of 656554261 is 162455656.

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 656554261 - 2¹ = 656554259 is a prime.

It is a super-2 number, since 2×656554261² = 862126995274512242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656554267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29843365 + ... + 29843386.

It is an arithmetic number, because the mean of its divisors is an integer number (179060256).

Almost surely, 2^656554261 is an apocalyptic number.

It is an amenable number.

656554261 is a deficient number, since it is larger than the sum of its proper divisors (59686763).

656554261 is a wasteful number, since it uses less digits than its factorization.

656554261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59686762.

The product of its digits is 216000, while the sum is 40.

The square root of 656554261 is about 25623.3147933674. The cubic root of 656554261 is about 869.1409413403.

The spelling of 656554261 in words is "six hundred fifty-six million, five hundred fifty-four thousand, two hundred sixty-one".