166099474 has 4 divisors (see below), whose sum is σ = 249149214. Its totient is φ = 83049736.

The previous prime is 166099447. The next prime is 166099553. The reversal of 166099474 is 474990661.

166099474 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 474990661 = 139 ⋅3417199.

It can be written as a sum of positive squares in only one way, i.e., 161925625 + 4173849 = 12725^2 + 2043^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41524867 + ... + 41524870.

Almost surely, 2^166099474 is an apocalyptic number.

166099474 is a deficient number, since it is larger than the sum of its proper divisors (83049740).

166099474 is an equidigital number, since it uses as much as digits as its factorization.

166099474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83049739.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 166099474 is about 12887.9584884496. The cubic root of 166099474 is about 549.6962223301.

The spelling of 166099474 in words is "one hundred sixty-six million, ninety-nine thousand, four hundred seventy-four".