3966432321625 has 16 divisors (see below), whose sum is σ = 5210639516160. Its totient is φ = 3006138178800.

The previous prime is 3966432321613. The next prime is 3966432321653. The reversal of 3966432321625 is 5261232346693.

It is not a de Polignac number, because 3966432321625 - 2⁹ = 3966432321113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 835036009 + ... + 835040758.

It is an arithmetic number, because the mean of its divisors is an integer number (325664969760).

Almost surely, 2^{3966432321625} is an apocalyptic number.

It is an amenable number.

3966432321625 is a deficient number, since it is larger than the sum of its proper divisors (1244207194535).

3966432321625 is a wasteful number, since it uses less digits than its factorization.

3966432321625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670076801 (or 1670076791 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 52.

The spelling of 3966432321625 in words is "three trillion, nine hundred sixty-six billion, four hundred thirty-two million, three hundred twenty-one thousand, six hundred twenty-five".