166550601 has 16 divisors (see below), whose sum is σ = 254260224. Its totient is φ = 94995984.

The previous prime is 166550597. The next prime is 166550609. The reversal of 166550601 is 106055661.

It is not a de Polignac number, because 166550601 - 2² = 166550597 is a prime.

It is a super-2 number, since 2×166550601² = 55478205386922402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166550609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4780 + ... + 18866.

It is an arithmetic number, because the mean of its divisors is an integer number (15891264).

Almost surely, 2^166550601 is an apocalyptic number.

It is an amenable number.

166550601 is a deficient number, since it is larger than the sum of its proper divisors (87709623).

166550601 is a wasteful number, since it uses less digits than its factorization.

166550601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14660.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 166550601 is about 12905.4485005365. The cubic root of 166550601 is about 550.1934316878.

The spelling of 166550601 in words is "one hundred sixty-six million, five hundred fifty thousand, six hundred one".