166023646 has 8 divisors (see below), whose sum is σ = 254334240. Its totient is φ = 81245568.

The previous prime is 166023643. The next prime is 166023647. The reversal of 166023646 is 646320661.

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

It is a super-2 number, since 2×166023646² = 55127702062266632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166023643) 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, 883011 + ... + 883198.

It is an arithmetic number, because the mean of its divisors is an integer number (31791780).

Almost surely, 2^166023646 is an apocalyptic number.

166023646 is a deficient number, since it is larger than the sum of its proper divisors (88310594).

166023646 is a wasteful number, since it uses less digits than its factorization.

166023646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766258.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 166023646 is about 12885.0163368154. The cubic root of 166023646 is about 549.6125601954.

The spelling of 166023646 in words is "one hundred sixty-six million, twenty-three thousand, six hundred forty-six".