166131503412 has 48 divisors (see below), whose sum is σ = 462278971392. Its totient is φ = 45402397920.

The previous prime is 166131503401. The next prime is 166131503413. The reversal of 166131503412 is 214305131661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166131503413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42992764 + ... + 42996627.

It is an arithmetic number, because the mean of its divisors is an integer number (9630811904).

Almost surely, 2^166131503412 is an apocalyptic number.

166131503412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166131503412 is an abundant number, since it is smaller than the sum of its proper divisors (296147467980).

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

166131503412 is a wasteful number, since it uses less digits than its factorization.

166131503412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85989428 (or 85989426 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 166131503412 in words is "one hundred sixty-six billion, one hundred thirty-one million, five hundred three thousand, four hundred twelve".