166251001 has 8 divisors (see below), whose sum is σ = 191498240. Its totient is φ = 141378048.

The previous prime is 166250993. The next prime is 166251013. The reversal of 166251001 is 100152661.

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

It is not a de Polignac number, because 166251001 - 2³ = 166250993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166251031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92616 + ... + 94393.

It is an arithmetic number, because the mean of its divisors is an integer number (23937280).

Almost surely, 2^166251001 is an apocalyptic number.

It is an amenable number.

166251001 is a deficient number, since it is larger than the sum of its proper divisors (25247239).

166251001 is a wasteful number, since it uses less digits than its factorization.

166251001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187143.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 166251001 is about 12893.8357752843. The cubic root of 166251001 is about 549.8633280240.

The spelling of 166251001 in words is "one hundred sixty-six million, two hundred fifty-one thousand, one".