3946864566 has 16 divisors (see below), whose sum is σ = 8309188800. Its totient is φ = 1246378248.

The previous prime is 3946864553. The next prime is 3946864573. The reversal of 3946864566 is 6654686493.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17310696 + ... + 17310923.

It is an arithmetic number, because the mean of its divisors is an integer number (519324300).

Almost surely, 2^3946864566 is an apocalyptic number.

3946864566 is an abundant number, since it is smaller than the sum of its proper divisors (4362324234).

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

3946864566 is a wasteful number, since it uses less digits than its factorization.

3946864566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34621643.

The product of its digits is 22394880, while the sum is 57.

The square root of 3946864566 is about 62824.0763242883. The cubic root of 3946864566 is about 1580.3407594357.

The spelling of 3946864566 in words is "three billion, nine hundred forty-six million, eight hundred sixty-four thousand, five hundred sixty-six".