1366691372 has 24 divisors (see below), whose sum is σ = 2497866336. Its totient is φ = 653067008.

The previous prime is 1366691369. The next prime is 1366691383. The reversal of 1366691372 is 2731966631.

It is a happy 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, 111668 + ... + 123300.

It is an arithmetic number, because the mean of its divisors is an integer number (104077764).

Almost surely, 2^1366691372 is an apocalyptic number.

It is an amenable number.

1366691372 is a deficient number, since it is larger than the sum of its proper divisors (1131174964).

1366691372 is a wasteful number, since it uses less digits than its factorization.

1366691372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12937 (or 12935 counting only the distinct ones).

The product of its digits is 244944, while the sum is 44.

The square root of 1366691372 is about 36968.7891605879. The cubic root of 1366691372 is about 1109.7457340389.

The spelling of 1366691372 in words is "one billion, three hundred sixty-six million, six hundred ninety-one thousand, three hundred seventy-two".