66593916 has 18 divisors (see below), whose sum is σ = 168334712. Its totient is φ = 22197960.

The previous prime is 66593899. The next prime is 66593939. The reversal of 66593916 is 61939566.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 924880 + ... + 924951.

Almost surely, 2^66593916 is an apocalyptic number.

It is an amenable number.

66593916 is an abundant number, since it is smaller than the sum of its proper divisors (101740796).

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

66593916 is a wasteful number, since it uses less digits than its factorization.

66593916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849841 (or 1849836 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 66593916 is about 8160.5095429146. The cubic root of 66593916 is about 405.3325846040.

The spelling of 66593916 in words is "sixty-six million, five hundred ninety-three thousand, nine hundred sixteen".