166204451 has 8 divisors (see below), whose sum is σ = 190027104. Its totient is φ = 142401600.

The previous prime is 166204433. The next prime is 166204469. The reversal of 166204451 is 154402661.

It is an interprime number because it is at equal distance from previous prime (166204433) and next prime (166204469).

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

It is a cyclic number.

It is not a de Polignac number, because 166204451 - 2²⁶ = 99095587 is a prime.

It is a super-2 number, since 2×166204451² = 55247839064422802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166204471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25751 + ... + 31551.

It is an arithmetic number, because the mean of its divisors is an integer number (23753388).

Almost surely, 2^166204451 is an apocalyptic number.

166204451 is a deficient number, since it is larger than the sum of its proper divisors (23822653).

166204451 is an equidigital number, since it uses as much as digits as its factorization.

166204451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9901.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 166204451 is about 12892.0305227687. The cubic root of 166204451 is about 549.8120029652.

The spelling of 166204451 in words is "one hundred sixty-six million, two hundred four thousand, four hundred fifty-one".