166663601 has 8 divisors (see below), whose sum is σ = 179699520. Its totient is φ = 153658512.

The previous prime is 166663591. The next prime is 166663603. The reversal of 166663601 is 106366661.

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 166663601 - 2²² = 162469297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166663603) 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, 4220 + ... + 18738.

It is an arithmetic number, because the mean of its divisors is an integer number (22462440).

Almost surely, 2^166663601 is an apocalyptic number.

It is an amenable number.

166663601 is a deficient number, since it is larger than the sum of its proper divisors (13035919).

166663601 is a wasteful number, since it uses less digits than its factorization.

166663601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15415.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 166663601 is about 12909.8257540526. The cubic root of 166663601 is about 550.3178339256.

The spelling of 166663601 in words is "one hundred sixty-six million, six hundred sixty-three thousand, six hundred one".