66157164 has 54 divisors (see below), whose sum is σ = 176600060. Its totient is φ = 20824560.

The previous prime is 66157159. The next prime is 66157181. The reversal of 66157164 is 46175166.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 212569 + ... + 212879.

Almost surely, 2^66157164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66157164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88300030).

66157164 is an abundant number, since it is smaller than the sum of its proper divisors (110442896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66157164 is a wasteful number, since it uses less digits than its factorization.

66157164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 335 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 66157164 is about 8133.7054286469. The cubic root of 66157164 is about 404.4445242679. Note that the first 3 decimals are identical.

The spelling of 66157164 in words is "sixty-six million, one hundred fifty-seven thousand, one hundred sixty-four".