66118651 has 8 divisors (see below), whose sum is σ = 69705680. Its totient is φ = 62542368.

The previous prime is 66118621. The next prime is 66118699. The reversal of 66118651 is 15681166.

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

It is a cyclic number.

It is not a de Polignac number, because 66118651 - 2²⁵ = 32564219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66118621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12085 + ... + 16681.

It is an arithmetic number, because the mean of its divisors is an integer number (8713210).

Almost surely, 2^66118651 is an apocalyptic number.

66118651 is a deficient number, since it is larger than the sum of its proper divisors (3587029).

66118651 is a wasteful number, since it uses less digits than its factorization.

66118651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5373.

The product of its digits is 8640, while the sum is 34.

The square root of 66118651 is about 8131.3375898434. The cubic root of 66118651 is about 404.3660273748.

The spelling of 66118651 in words is "sixty-six million, one hundred eighteen thousand, six hundred fifty-one".