166466321 has 8 divisors (see below), whose sum is σ = 190372800. Its totient is φ = 142591248.

The previous prime is 166466303. The next prime is 166466327. The reversal of 166466321 is 123664661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166466321 is a prime.

It is a super-2 number, since 2×166466321² = 55422072054550082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166466327) 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, 4895 + ... + 18891.

It is an arithmetic number, because the mean of its divisors is an integer number (23796600).

Almost surely, 2^166466321 is an apocalyptic number.

It is an amenable number.

166466321 is a deficient number, since it is larger than the sum of its proper divisors (23906479).

166466321 is a wasteful number, since it uses less digits than its factorization.

166466321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15703.

The product of its digits is 31104, while the sum is 35.

The square root of 166466321 is about 12902.1827998211. The cubic root of 166466321 is about 550.1006107954.

The spelling of 166466321 in words is "one hundred sixty-six million, four hundred sixty-six thousand, three hundred twenty-one".