2166132343772 has 12 divisors (see below), whose sum is σ = 3829811309520. Its totient is φ = 1071900541056.

The previous prime is 2166132343723. The next prime is 2166132343777. The reversal of 2166132343772 is 2773432316612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166132343777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2791407272 + ... + 2791408047.

It is an arithmetic number, because the mean of its divisors is an integer number (319150942460).

Almost surely, 2^{2166132343772} is an apocalyptic number.

It is an amenable number.

2166132343772 is a deficient number, since it is larger than the sum of its proper divisors (1663678965748).

2166132343772 is a wasteful number, since it uses less digits than its factorization.

2166132343772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5582815420 (or 5582815418 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 47.

The spelling of 2166132343772 in words is "two trillion, one hundred sixty-six billion, one hundred thirty-two million, three hundred forty-three thousand, seven hundred seventy-two".