66136536 has 24 divisors (see below), whose sum is σ = 179119980. Its totient is φ = 22045488.

The previous prime is 66136531. The next prime is 66136541. The reversal of 66136536 is 63563166.

It is a happy number.

66136536 is a `hidden beast` number, since 6 + 613 + 6 + 5 + 36 = 666.

It is an interprime number because it is at equal distance from previous prime (66136531) and next prime (66136541).

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a self number, because there is not a number n which added to its sum of digits gives 66136536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66136531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 459210 + ... + 459353.

Almost surely, 2^66136536 is an apocalyptic number.

It is an amenable number.

66136536 is an abundant number, since it is smaller than the sum of its proper divisors (112983444).

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

66136536 is a wasteful number, since it uses less digits than its factorization.

66136536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918575 (or 918568 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 66136536 is about 8132.4372730443. The cubic root of 66136536 is about 404.4024842307.

The spelling of 66136536 in words is "sixty-six million, one hundred thirty-six thousand, five hundred thirty-six".