166981416 has 48 divisors (see below), whose sum is σ = 485612640. Its totient is φ = 47708640.

The previous prime is 166981411. The next prime is 166981453. The reversal of 166981416 is 614189661.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (166981411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69820 + ... + 72171.

It is an arithmetic number, because the mean of its divisors is an integer number (10116930).

Almost surely, 2^166981416 is an apocalyptic number.

It is an amenable number.

166981416 is an abundant number, since it is smaller than the sum of its proper divisors (318631224).

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

166981416 is a wasteful number, since it uses less digits than its factorization.

166981416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142014 (or 142003 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 166981416 is about 12922.1289267674. The cubic root of 166981416 is about 550.6674167694.

The spelling of 166981416 in words is "one hundred sixty-six million, nine hundred eighty-one thousand, four hundred sixteen".