3551656660 has 24 divisors (see below), whose sum is σ = 7897213800. Its totient is φ = 1337094144.

The previous prime is 3551656631. The next prime is 3551656733. The reversal of 3551656660 is 666561553.

It can be written as a sum of positive squares in 4 ways, for example, as 2031124624 + 1520532036 = 45068^2 + 38994^2 .

It is a super-2 number, since 2×3551656660² = 25228530061044711200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5222685 + ... + 5223364.

It is an arithmetic number, because the mean of its divisors is an integer number (329050575).

Almost surely, 2^3551656660 is an apocalyptic number.

It is an amenable number.

3551656660 is an abundant number, since it is smaller than the sum of its proper divisors (4345557140).

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

3551656660 is a wasteful number, since it uses less digits than its factorization.

3551656660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10446075 (or 10446073 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 43.

The square root of 3551656660 is about 59595.7771993956. Note that the first 3 decimals coincide. The cubic root of 3551656660 is about 1525.7275625335.

The spelling of 3551656660 in words is "three billion, five hundred fifty-one million, six hundred fifty-six thousand, six hundred sixty".