66064824634 has 4 divisors (see below), whose sum is σ = 99097236954. Its totient is φ = 33032412316.

The previous prime is 66064824613. The next prime is 66064824641. The reversal of 66064824634 is 43642846066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 47130239025 + 18934585609 = 217095^2 + 137603^2 .

It is a super-2 number, since 2×66064824634² (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 (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16516206157 + ... + 16516206160.

Almost surely, 2^66064824634 is an apocalyptic number.

66064824634 is a deficient number, since it is larger than the sum of its proper divisors (33032412320).

66064824634 is a wasteful number, since it uses less digits than its factorization.

66064824634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33032412319.

The product of its (nonzero) digits is 3981312, while the sum is 49.

The spelling of 66064824634 in words is "sixty-six billion, sixty-four million, eight hundred twenty-four thousand, six hundred thirty-four".