166950001 has 4 divisors (see below), whose sum is σ = 167007604. Its totient is φ = 166892400.

The previous prime is 166949983. The next prime is 166950011. The reversal of 166950001 is 100059661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80013025 + 86936976 = 8945^2 + 9324^2 .

It is a cyclic number.

It is not a de Polignac number, because 166950001 - 2⁷ = 166949873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166950011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24210 + ... + 30331.

It is an arithmetic number, because the mean of its divisors is an integer number (41751901).

Almost surely, 2^166950001 is an apocalyptic number.

It is an amenable number.

166950001 is a deficient number, since it is larger than the sum of its proper divisors (57603).

166950001 is an equidigital number, since it uses as much as digits as its factorization.

166950001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57602.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 166950001 is about 12920.9133191118. The cubic root of 166950001 is about 550.6328813856.

The spelling of 166950001 in words is "one hundred sixty-six million, nine hundred fifty thousand, one".