166117655 has 16 divisors (see below), whose sum is σ = 224964000. Its totient is φ = 116645760.

The previous prime is 166117631. The next prime is 166117657. The reversal of 166117655 is 556711661.

166117655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-166117655 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166117657) 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, 50480 + ... + 53669.

It is an arithmetic number, because the mean of its divisors is an integer number (14060250).

Almost surely, 2^166117655 is an apocalyptic number.

166117655 is a deficient number, since it is larger than the sum of its proper divisors (58846345).

166117655 is a wasteful number, since it uses less digits than its factorization.

166117655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104194.

The product of its digits is 37800, while the sum is 38.

The square root of 166117655 is about 12888.6638174793. The cubic root of 166117655 is about 549.7162779072.

The spelling of 166117655 in words is "one hundred sixty-six million, one hundred seventeen thousand, six hundred fifty-five".