66875488734 has 16 divisors (see below), whose sum is σ = 134771978880. Its totient is φ = 22121662680.

The previous prime is 66875488727. The next prime is 66875488751. The reversal of 66875488734 is 43788457866.

It is a super-2 number, since 2×66875488734² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42540874 + ... + 42542445.

It is an arithmetic number, because the mean of its divisors is an integer number (8423248680).

Almost surely, 2^66875488734 is an apocalyptic number.

66875488734 is an abundant number, since it is smaller than the sum of its proper divisors (67896490146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66875488734 is a wasteful number, since it uses less digits than its factorization.

66875488734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85083455.

The product of its digits is 216760320, while the sum is 66.

The spelling of 66875488734 in words is "sixty-six billion, eight hundred seventy-five million, four hundred eighty-eight thousand, seven hundred thirty-four".