166652566 has 8 divisors (see below), whose sum is σ = 250721640. Its totient is φ = 83078688.

The previous prime is 166652561. The next prime is 166652579. The reversal of 166652566 is 665256661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166652561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122956 + ... + 124303.

It is an arithmetic number, because the mean of its divisors is an integer number (31340205).

Almost surely, 2^166652566 is an apocalyptic number.

166652566 is a deficient number, since it is larger than the sum of its proper divisors (84069074).

166652566 is a wasteful number, since it uses less digits than its factorization.

166652566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247598.

The product of its digits is 388800, while the sum is 43.

The square root of 166652566 is about 12909.3983593350. The cubic root of 166652566 is about 550.3056879196.

The spelling of 166652566 in words is "one hundred sixty-six million, six hundred fifty-two thousand, five hundred sixty-six".