66565262066 has 16 divisors (see below), whose sum is σ = 101229705600. Its totient is φ = 32823009648.

The previous prime is 66565262041. The next prime is 66565262147. The reversal of 66565262066 is 66026256566.

It is a super-2 number, since 2×66565262066² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109505 + ... + 380948.

It is an arithmetic number, because the mean of its divisors is an integer number (6326856600).

Almost surely, 2^66565262066 is an apocalyptic number.

66565262066 is a deficient number, since it is larger than the sum of its proper divisors (34664443534).

66565262066 is a wasteful number, since it uses less digits than its factorization.

66565262066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491393.

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 66565262066 in words is "sixty-six billion, five hundred sixty-five million, two hundred sixty-two thousand, sixty-six".