166971540 has 24 divisors (see below), whose sum is σ = 467520480. Its totient is φ = 44525728.

The previous prime is 166971521. The next prime is 166971551. The reversal of 166971540 is 45179661.

166971540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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, 1391370 + ... + 1391489.

It is an arithmetic number, because the mean of its divisors is an integer number (19480020).

Almost surely, 2^166971540 is an apocalyptic number.

166971540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166971540 is an abundant number, since it is smaller than the sum of its proper divisors (300548940).

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

166971540 is a wasteful number, since it uses less digits than its factorization.

166971540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782871 (or 2782869 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 166971540 is about 12921.7467859419. The cubic root of 166971540 is about 550.6565602746.

The spelling of 166971540 in words is "one hundred sixty-six million, nine hundred seventy-one thousand, five hundred forty".