66134264515 has 32 divisors (see below), whose sum is σ = 90373542912. Its totient is φ = 45989328000.

The previous prime is 66134264509. The next prime is 66134264527. The reversal of 66134264515 is 51546243166.

It is not a de Polignac number, because 66134264515 - 2¹⁹ = 66133740227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4066450 + ... + 4082680.

It is an arithmetic number, because the mean of its divisors is an integer number (2824173216).

Almost surely, 2^66134264515 is an apocalyptic number.

66134264515 is a deficient number, since it is larger than the sum of its proper divisors (24239278397).

66134264515 is a wasteful number, since it uses less digits than its factorization.

66134264515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19491.

The product of its digits is 518400, while the sum is 43.

The spelling of 66134264515 in words is "sixty-six billion, one hundred thirty-four million, two hundred sixty-four thousand, five hundred fifteen".