656456749 has 8 divisors (see below), whose sum is σ = 708365952. Its totient is φ = 604749360.

The previous prime is 656456747. The next prime is 656456753. The reversal of 656456749 is 947654656.

It is a happy number.

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 656456749 - 2¹ = 656456747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 656456696 and 656456705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656456747) 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, 43657 + ... + 56734.

It is an arithmetic number, because the mean of its divisors is an integer number (88545744).

Almost surely, 2^656456749 is an apocalyptic number.

It is an amenable number.

656456749 is a deficient number, since it is larger than the sum of its proper divisors (51909203).

656456749 is a wasteful number, since it uses less digits than its factorization.

656456749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100907.

The product of its digits is 5443200, while the sum is 52.

The square root of 656456749 is about 25621.4119244042. The cubic root of 656456749 is about 869.0979106915.

The spelling of 656456749 in words is "six hundred fifty-six million, four hundred fifty-six thousand, seven hundred forty-nine".