66652166 has 16 divisors (see below), whose sum is σ = 114491904. Its totient is φ = 28507464.

The previous prime is 66652147. The next prime is 66652177. The reversal of 66652166 is 66125666.

It is a super-2 number, since 2×66652166² = 8885022464983112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 2771 + ... + 11873.

It is an arithmetic number, because the mean of its divisors is an integer number (7155744).

Almost surely, 2^66652166 is an apocalyptic number.

66652166 is a deficient number, since it is larger than the sum of its proper divisors (47839738).

66652166 is a wasteful number, since it uses less digits than its factorization.

66652166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9635.

The product of its digits is 77760, while the sum is 38.

The square root of 66652166 is about 8164.0777801292. The cubic root of 66652166 is about 405.4507322452.

The spelling of 66652166 in words is "sixty-six million, six hundred fifty-two thousand, one hundred sixty-six".