166363661 has 8 divisors (see below), whose sum is σ = 169711200. Its totient is φ = 163023952.

The previous prime is 166363627. The next prime is 166363663.

166363661 is nontrivially palindromic in base 10.

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 166363661 - 2¹⁸ = 166101517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166363663) 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, 60290 + ... + 62988.

It is an arithmetic number, because the mean of its divisors is an integer number (21213900).

Almost surely, 2^166363661 is an apocalyptic number.

It is an amenable number.

166363661 is a deficient number, since it is larger than the sum of its proper divisors (3347539).

166363661 is a wasteful number, since it uses less digits than its factorization.

166363661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3915.

The product of its digits is 69984, while the sum is 38.

The square root of 166363661 is about 12898.2037896755. The cubic root of 166363661 is about 549.9875049503.

The spelling of 166363661 in words is "one hundred sixty-six million, three hundred sixty-three thousand, six hundred sixty-one".