66244365 has 64 divisors (see below), whose sum is σ = 132710400. Its totient is φ = 31060800.

The previous prime is 66244337. The next prime is 66244369. The reversal of 66244365 is 56344266.

66244365 = T₄₄₅ + T₄₄₆ + ... + T₇₈₅.

It is not a de Polignac number, because 66244365 - 2²² = 62050061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66244369) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 45316 + ... + 46754.

It is an arithmetic number, because the mean of its divisors is an integer number (2073600).

Almost surely, 2^66244365 is an apocalyptic number.

It is an amenable number.

66244365 is an abundant number, since it is smaller than the sum of its proper divisors (66466035).

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

66244365 is a wasteful number, since it uses less digits than its factorization.

66244365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495 (or 1489 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 66244365 is about 8139.0641353905. The cubic root of 66244365 is about 404.6221441493.

Subtracting from 66244365 its reverse (56344266), we obtain a palindrome (9900099).

The spelling of 66244365 in words is "sixty-six million, two hundred forty-four thousand, three hundred sixty-five".