166537274 has 8 divisors (see below), whose sum is σ = 249867828. Its totient is φ = 83248000.

The previous prime is 166537247. The next prime is 166537291. The reversal of 166537274 is 472735661.

166537274 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 143832049 + 22705225 = 11993^2 + 4765^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3434 + ... + 18570.

Almost surely, 2^166537274 is an apocalyptic number.

166537274 is a deficient number, since it is larger than the sum of its proper divisors (83330554).

166537274 is a wasteful number, since it uses less digits than its factorization.

166537274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20640.

The product of its digits is 211680, while the sum is 41.

The square root of 166537274 is about 12904.9321578999. The cubic root of 166537274 is about 550.1787562210.

The spelling of 166537274 in words is "one hundred sixty-six million, five hundred thirty-seven thousand, two hundred seventy-four".