66117159 has 12 divisors (see below), whose sum is σ = 96201456. Its totient is φ = 43755552.

The previous prime is 66117151. The next prime is 66117167. The reversal of 66117159 is 95171166.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66117151) and next prime (66117167).

It is not a de Polignac number, because 66117159 - 2³ = 66117151 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66117151) 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, 25579 + ... + 28044.

It is an arithmetic number, because the mean of its divisors is an integer number (8016788).

Almost surely, 2^66117159 is an apocalyptic number.

66117159 is a deficient number, since it is larger than the sum of its proper divisors (30084297).

66117159 is a wasteful number, since it uses less digits than its factorization.

66117159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53766 (or 53763 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 66117159 is about 8131.2458455024. The cubic root of 66117159 is about 404.3629857789.

The spelling of 66117159 in words is "sixty-six million, one hundred seventeen thousand, one hundred fifty-nine".