66634983 has 6 divisors (see below), whose sum is σ = 96250544. Its totient is φ = 44423316.

The previous prime is 66634961. The next prime is 66635017. The reversal of 66634983 is 38943666.

It is a de Polignac number, because none of the positive numbers 2^k-66634983 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 (66634943) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3701935 + ... + 3701952.

Almost surely, 2^66634983 is an apocalyptic number.

66634983 is a deficient number, since it is larger than the sum of its proper divisors (29615561).

66634983 is a wasteful number, since it uses less digits than its factorization.

66634983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7403893 (or 7403890 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 66634983 is about 8163.0253582848. The cubic root of 66634983 is about 405.4158873726.

The spelling of 66634983 in words is "sixty-six million, six hundred thirty-four thousand, nine hundred eighty-three".