166142439 has 12 divisors (see below), whose sum is σ = 244512216. Its totient is φ = 108671472.

The previous prime is 166142437. The next prime is 166142447. The reversal of 166142439 is 934241661.

166142439 is a `hidden beast` number, since 1 + 6 + 614 + 2 + 4 + 39 = 666.

It is not a de Polignac number, because 166142439 - 2¹ = 166142437 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166142437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173677 + ... + 174630.

It is an arithmetic number, because the mean of its divisors is an integer number (20376018).

Almost surely, 2^166142439 is an apocalyptic number.

166142439 is a deficient number, since it is larger than the sum of its proper divisors (78369777).

166142439 is a wasteful number, since it uses less digits than its factorization.

166142439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348366 (or 348363 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 166142439 is about 12889.6252466858. The cubic root of 166142439 is about 549.7436149387.

It can be divided in two parts, 1661 and 42439, that added together give a square (44100 = 210²).

The spelling of 166142439 in words is "one hundred sixty-six million, one hundred forty-two thousand, four hundred thirty-nine".