66633264515 has 16 divisors (see below), whose sum is σ = 84677648832. Its totient is φ = 50162509824.

The previous prime is 66633264473. The next prime is 66633264521. The reversal of 66633264515 is 51546233666.

It is a de Polignac number, because none of the positive numbers 2^k-66633264515 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66633264515.

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, 469202 + ... + 594488.

It is an arithmetic number, because the mean of its divisors is an integer number (5292353052).

Almost surely, 2^66633264515 is an apocalyptic number.

66633264515 is a deficient number, since it is larger than the sum of its proper divisors (18044384317).

66633264515 is a wasteful number, since it uses less digits than its factorization.

66633264515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131566.

The product of its digits is 2332800, while the sum is 47.

The spelling of 66633264515 in words is "sixty-six billion, six hundred thirty-three million, two hundred sixty-four thousand, five hundred fifteen".