3972431338666 has 16 divisors (see below), whose sum is σ = 7168297152960. Its totient is φ = 1612866859200.

The previous prime is 3972431338663. The next prime is 3972431338769. The reversal of 3972431338666 is 6668331342793.

It is not an unprimeable number, because it can be changed into a prime (3972431338663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7466975935 + ... + 7466976466.

It is an arithmetic number, because the mean of its divisors is an integer number (448018572060).

Almost surely, 2^{3972431338666} is an apocalyptic number.

3972431338666 is a deficient number, since it is larger than the sum of its proper divisors (3195865814294).

3972431338666 is a wasteful number, since it uses less digits than its factorization.

3972431338666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14933952429.

The product of its digits is 70543872, while the sum is 61.

The spelling of 3972431338666 in words is "three trillion, nine hundred seventy-two billion, four hundred thirty-one million, three hundred thirty-eight thousand, six hundred sixty-six".