164996666 has 4 divisors (see below), whose sum is σ = 247495002. Its totient is φ = 82498332.

The previous prime is 164996659. The next prime is 164996681. The reversal of 164996666 is 666699461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666699461 = 139 ⋅4796399.

It can be written as a sum of positive squares in only one way, i.e., 152893225 + 12103441 = 12365^2 + 3479^2 .

It is a super-2 number, since 2×164996666² = 54447799582231112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41249165 + ... + 41249168.

Almost surely, 2^164996666 is an apocalyptic number.

164996666 is a deficient number, since it is larger than the sum of its proper divisors (82498336).

164996666 is an equidigital number, since it uses as much as digits as its factorization.

164996666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82498335.

The product of its digits is 2519424, while the sum is 53.

The square root of 164996666 is about 12845.1028022356. The cubic root of 164996666 is about 548.4769610073.

The spelling of 164996666 in words is "one hundred sixty-four million, nine hundred ninety-six thousand, six hundred sixty-six".