66117315 has 16 divisors (see below), whose sum is σ = 115405056. Its totient is φ = 32056800.

The previous prime is 66117257. The next prime is 66117319. The reversal of 66117315 is 51371166.

It is not a de Polignac number, because 66117315 - 2⁶ = 66117251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66117319) 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, 200191 + ... + 200520.

It is an arithmetic number, because the mean of its divisors is an integer number (7212816).

Almost surely, 2^66117315 is an apocalyptic number.

66117315 is a deficient number, since it is larger than the sum of its proper divisors (49287741).

66117315 is a wasteful number, since it uses less digits than its factorization.

66117315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400730.

The product of its digits is 3780, while the sum is 30.

The square root of 66117315 is about 8131.2554381227. The cubic root of 66117315 is about 404.3633038031.

The spelling of 66117315 in words is "sixty-six million, one hundred seventeen thousand, three hundred fifteen".