3661000656 has 20 divisors (see below), whose sum is σ = 9457585152. Its totient is φ = 1220333536.

The previous prime is 3661000639. The next prime is 3661000661. The reversal of 3661000656 is 6560001663.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38135376 + ... + 38135471.

Almost surely, 2^3661000656 is an apocalyptic number.

It is an amenable number.

3661000656 is an abundant number, since it is smaller than the sum of its proper divisors (5796584496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3661000656 is a wasteful number, since it uses less digits than its factorization.

3661000656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76270858 (or 76270852 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 3661000656 is about 60506.2034505554. The cubic root of 3661000656 is about 1541.2269774084.

The spelling of 3661000656 in words is "three billion, six hundred sixty-one million, six hundred fifty-six", and thus it is an aban number.