166613642 has 16 divisors (see below), whose sum is σ = 278427240. Its totient is φ = 74246592.

The previous prime is 166613639. The next prime is 166613669. The reversal of 166613642 is 246316661.

166613642 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 4 ways, for example, as 93528241 + 73085401 = 9671^2 + 8549^2 .

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, 109733 + ... + 111240.

Almost surely, 2^166613642 is an apocalyptic number.

166613642 is a deficient number, since it is larger than the sum of its proper divisors (111813598).

166613642 is a wasteful number, since it uses less digits than its factorization.

166613642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221017.

The product of its digits is 31104, while the sum is 35.

The square root of 166613642 is about 12907.8906874826. The cubic root of 166613642 is about 550.2628407616.

The spelling of 166613642 in words is "one hundred sixty-six million, six hundred thirteen thousand, six hundred forty-two".