12156666474 has 16 divisors (see below), whose sum is σ = 24333227712. Its totient is φ = 4048906368.

The previous prime is 12156666451. The next prime is 12156666479. The reversal of 12156666474 is 47466665121.

It is not an unprimeable number, because it can be changed into a prime (12156666479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 820999 + ... + 835674.

It is an arithmetic number, because the mean of its divisors is an integer number (1520826732).

Almost surely, 2^12156666474 is an apocalyptic number.

12156666474 is an abundant number, since it is smaller than the sum of its proper divisors (12176561238).

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

12156666474 is a wasteful number, since it uses less digits than its factorization.

12156666474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657901.

The product of its digits is 1451520, while the sum is 48.

The spelling of 12156666474 in words is "twelve billion, one hundred fifty-six million, six hundred sixty-six thousand, four hundred seventy-four".