66800983 has 4 divisors (see below), whose sum is σ = 66832480. Its totient is φ = 66769488.

The previous prime is 66800971. The next prime is 66800999. The reversal of 66800983 is 38900866.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66800983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66800963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12318 + ... + 16891.

It is an arithmetic number, because the mean of its divisors is an integer number (16708120).

Almost surely, 2^66800983 is an apocalyptic number.

66800983 is a deficient number, since it is larger than the sum of its proper divisors (31497).

66800983 is a wasteful number, since it uses less digits than its factorization.

66800983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31496.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 66800983 is about 8173.1868325641. The cubic root of 66800983 is about 405.7522633858.

The spelling of 66800983 in words is "sixty-six million, eight hundred thousand, nine hundred eighty-three".