66466565 has 16 divisors (see below), whose sum is σ = 87816960. Its totient is φ = 47891520.

The previous prime is 66466559. The next prime is 66466607. The reversal of 66466565 is 56566466.

It is not a de Polignac number, because 66466565 - 2²² = 62272261 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452 + ... + 11538.

It is an arithmetic number, because the mean of its divisors is an integer number (5488560).

Almost surely, 2^66466565 is an apocalyptic number.

It is an amenable number.

66466565 is a deficient number, since it is larger than the sum of its proper divisors (21350395).

66466565 is a wasteful number, since it uses less digits than its factorization.

66466565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11212.

The product of its digits is 777600, while the sum is 44.

The square root of 66466565 is about 8152.7029260240. The cubic root of 66466565 is about 405.0740402155.

Subtracting from 66466565 its reverse (56566466), we obtain a palindrome (9900099).

The spelling of 66466565 in words is "sixty-six million, four hundred sixty-six thousand, five hundred sixty-five".