66165636 has 48 divisors (see below), whose sum is σ = 159239808. Its totient is φ = 21369600.

The previous prime is 66165629. The next prime is 66165637. The reversal of 66165636 is 63656166.

Its product of digits (116640) is a multiple of the sum of its prime factors (972).

It is a junction number, because it is equal to n+sod(n) for n = 66165594 and 66165603.

It is not an unprimeable number, because it can be changed into a prime (66165637) 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, 88681 + ... + 89423.

It is an arithmetic number, because the mean of its divisors is an integer number (3317496).

Almost surely, 2^66165636 is an apocalyptic number.

It is an amenable number.

66165636 is an abundant number, since it is smaller than the sum of its proper divisors (93074172).

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

66165636 is a wasteful number, since it uses less digits than its factorization.

66165636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972 (or 970 counting only the distinct ones).

The product of its digits is 116640, while the sum is 39.

The square root of 66165636 is about 8134.2262078209. The cubic root of 66165636 is about 404.4617877435.

The spelling of 66165636 in words is "sixty-six million, one hundred sixty-five thousand, six hundred thirty-six".