1656740656 has 10 divisors (see below), whose sum is σ = 3209935052. Its totient is φ = 828370320.

The previous prime is 1656740633. The next prime is 1656740689. The reversal of 1656740656 is 6560476561.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51773130 + ... + 51773161.

Almost surely, 2^1656740656 is an apocalyptic number.

1656740656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1656740656 is a deficient number, since it is larger than the sum of its proper divisors (1553194396).

1656740656 is a wasteful number, since it uses less digits than its factorization.

1656740656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103546299 (or 103546293 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 46.

The square root of 1656740656 is about 40703.0791955596. The cubic root of 1656740656 is about 1183.2726959781.

The spelling of 1656740656 in words is "one billion, six hundred fifty-six million, seven hundred forty thousand, six hundred fifty-six".