66117166 has 4 divisors (see below), whose sum is σ = 99175752. Its totient is φ = 33058582.

The previous prime is 66117151. The next prime is 66117167. The reversal of 66117166 is 66171166.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66117167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16529290 + ... + 16529293.

It is an arithmetic number, because the mean of its divisors is an integer number (24793938).

Almost surely, 2^66117166 is an apocalyptic number.

66117166 is a deficient number, since it is larger than the sum of its proper divisors (33058586).

66117166 is a wasteful number, since it uses less digits than its factorization.

66117166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33058585.

The product of its digits is 9072, while the sum is 34.

The square root of 66117166 is about 8131.2462759407. The cubic root of 66117166 is about 404.3630000492.

The spelling of 66117166 in words is "sixty-six million, one hundred seventeen thousand, one hundred sixty-six".