3651666558 has 24 divisors (see below), whose sum is σ = 7485828504. Its totient is φ = 1187530560.

The previous prime is 3651666509. The next prime is 3651666569. The reversal of 3651666558 is 8556661563.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 3651666558.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170941 + ... + 191112.

It is an arithmetic number, because the mean of its divisors is an integer number (311909521).

Almost surely, 2^3651666558 is an apocalyptic number.

3651666558 is an abundant number, since it is smaller than the sum of its proper divisors (3834161946).

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

3651666558 is a wasteful number, since it uses less digits than its factorization.

3651666558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362140 (or 362099 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 51.

The square root of 3651666558 is about 60429.0208260898. The cubic root of 3651666558 is about 1539.9160236999.

The spelling of 3651666558 in words is "three billion, six hundred fifty-one million, six hundred sixty-six thousand, five hundred fifty-eight".