166615101 has 12 divisors (see below), whose sum is σ = 242505120. Its totient is φ = 110228040.

The previous prime is 166615073. The next prime is 166615117. The reversal of 166615101 is 101516661.

It is not a de Polignac number, because 166615101 - 2⁵ = 166615069 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166615171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69481 + ... + 71838.

It is an arithmetic number, because the mean of its divisors is an integer number (20208760).

Almost surely, 2^166615101 is an apocalyptic number.

It is an amenable number.

166615101 is a deficient number, since it is larger than the sum of its proper divisors (75890019).

166615101 is a wasteful number, since it uses less digits than its factorization.

166615101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141456 (or 141453 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 166615101 is about 12907.9472031768. The cubic root of 166615101 is about 550.2644469349.

The spelling of 166615101 in words is "one hundred sixty-six million, six hundred fifteen thousand, one hundred one".