656701947 has 12 divisors (see below), whose sum is σ = 1034803224. Its totient is φ = 398001120.

The previous prime is 656701943. The next prime is 656701963. The reversal of 656701947 is 749107656.

It is a happy number.

It is not a de Polignac number, because 656701947 - 2² = 656701943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (656701943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3316578 + ... + 3316775.

It is an arithmetic number, because the mean of its divisors is an integer number (86233602).

Almost surely, 2^656701947 is an apocalyptic number.

656701947 is a deficient number, since it is larger than the sum of its proper divisors (378101277).

656701947 is a wasteful number, since it uses less digits than its factorization.

656701947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6633370 (or 6633367 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 656701947 is about 25626.1964988954. The cubic root of 656701947 is about 869.2061049444.

The spelling of 656701947 in words is "six hundred fifty-six million, seven hundred one thousand, nine hundred forty-seven".