166326001 has 4 divisors (see below), whose sum is σ = 166467312. Its totient is φ = 166184692.

The previous prime is 166325993. The next prime is 166326023. The reversal of 166326001 is 100623661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166326001 - 2³ = 166325993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166326101) 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, 68875 + ... + 71248.

It is an arithmetic number, because the mean of its divisors is an integer number (41616828).

Almost surely, 2^166326001 is an apocalyptic number.

It is an amenable number.

166326001 is a deficient number, since it is larger than the sum of its proper divisors (141311).

166326001 is a wasteful number, since it uses less digits than its factorization.

166326001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141310.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 166326001 is about 12896.7438138470. The cubic root of 166326001 is about 549.9460013102.

Adding to 166326001 its reverse (100623661), we get a palindrome (266949662).

The spelling of 166326001 in words is "one hundred sixty-six million, three hundred twenty-six thousand, one".