66983814 has 32 divisors (see below), whose sum is σ = 150958080. Its totient is φ = 22012200.

The previous prime is 66983783. The next prime is 66983827. The reversal of 66983814 is 41838966.

It is a self number, because there is not a number n which added to its sum of digits gives 66983814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4902 + ... + 12569.

It is an arithmetic number, because the mean of its divisors is an integer number (4717440).

Almost surely, 2^66983814 is an apocalyptic number.

66983814 is an abundant number, since it is smaller than the sum of its proper divisors (83974266).

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

66983814 is a wasteful number, since it uses less digits than its factorization.

66983814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17553 (or 17547 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 66983814 is about 8184.3639948380. The cubic root of 66983814 is about 406.1221008345.

The spelling of 66983814 in words is "sixty-six million, nine hundred eighty-three thousand, eight hundred fourteen".