66115157 has 16 divisors (see below), whose sum is σ = 71124480. Its totient is φ = 61320000.

The previous prime is 66115141. The next prime is 66115169. The reversal of 66115157 is 75151166.

It is a cyclic number.

It is not a de Polignac number, because 66115157 - 2⁴ = 66115141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66115757) 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, 225503 + ... + 225795.

It is an arithmetic number, because the mean of its divisors is an integer number (4445280).

Almost surely, 2^66115157 is an apocalyptic number.

It is an amenable number.

66115157 is a deficient number, since it is larger than the sum of its proper divisors (5009323).

66115157 is a wasteful number, since it uses less digits than its factorization.

66115157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604.

The product of its digits is 6300, while the sum is 32.

The square root of 66115157 is about 8131.1227392040. The cubic root of 66115157 is about 404.3589044235.

The spelling of 66115157 in words is "sixty-six million, one hundred fifteen thousand, one hundred fifty-seven".