66365436 has 24 divisors (see below), whose sum is σ = 155146320. Its totient is φ = 22079872.

The previous prime is 66365401. The next prime is 66365437. The reversal of 66365436 is 63456366.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66365394 and 66365403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66365437) 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, 1720 + ... + 11648.

It is an arithmetic number, because the mean of its divisors is an integer number (6464430).

Almost surely, 2^66365436 is an apocalyptic number.

It is an amenable number.

66365436 is an abundant number, since it is smaller than the sum of its proper divisors (88780884).

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

66365436 is a wasteful number, since it uses less digits than its factorization.

66365436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10493 (or 10491 counting only the distinct ones).

The product of its digits is 233280, while the sum is 39.

The square root of 66365436 is about 8146.4983888785. The cubic root of 66365436 is about 404.8684956374.

The spelling of 66365436 in words is "sixty-six million, three hundred sixty-five thousand, four hundred thirty-six".