166266655 has 8 divisors (see below), whose sum is σ = 208194912. Its totient is φ = 127230048.

The previous prime is 166266649. The next prime is 166266697. The reversal of 166266655 is 556662661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166266655 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722784 + ... + 723013.

It is an arithmetic number, because the mean of its divisors is an integer number (26024364).

Almost surely, 2^166266655 is an apocalyptic number.

166266655 is a deficient number, since it is larger than the sum of its proper divisors (41928257).

166266655 is a wasteful number, since it uses less digits than its factorization.

166266655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445825.

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

The square root of 166266655 is about 12894.4427952510. The cubic root of 166266655 is about 549.8805856452.

The spelling of 166266655 in words is "one hundred sixty-six million, two hundred sixty-six thousand, six hundred fifty-five".