66893528074 has 4 divisors (see below), whose sum is σ = 100340292114. Its totient is φ = 33446764036.

The previous prime is 66893528069. The next prime is 66893528101. The reversal of 66893528074 is 47082539866.

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., 35065184049 + 31828344025 = 187257^2 + 178405^2 .

It is a super-2 number, since 2×66893528074² (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 (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16723382017 + ... + 16723382020.

Almost surely, 2^66893528074 is an apocalyptic number.

66893528074 is a deficient number, since it is larger than the sum of its proper divisors (33446764040).

66893528074 is a wasteful number, since it uses less digits than its factorization.

66893528074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33446764039.

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 66893528074 in words is "sixty-six billion, eight hundred ninety-three million, five hundred twenty-eight thousand, seventy-four".