166001098 has 4 divisors (see below), whose sum is σ = 249001650. Its totient is φ = 83000548.

The previous prime is 166001071. The next prime is 166001111. The reversal of 166001098 is 890100661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 890100661 = 113 ⋅7876997.

It can be written as a sum of positive squares in only one way, i.e., 146579449 + 19421649 = 12107^2 + 4407^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41500273 + ... + 41500276.

Almost surely, 2^166001098 is an apocalyptic number.

166001098 is a deficient number, since it is larger than the sum of its proper divisors (83000552).

166001098 is an equidigital number, since it uses as much as digits as its factorization.

166001098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83000551.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 166001098 is about 12884.1413373185. The cubic root of 166001098 is about 549.5876777457.

The spelling of 166001098 in words is "one hundred sixty-six million, one thousand, ninety-eight".