66242984 has 8 divisors (see below), whose sum is σ = 124205610. Its totient is φ = 33121488.

The previous prime is 66242983. The next prime is 66242993. The reversal of 66242984 is 48924266.

It can be written as a sum of positive squares in only one way, i.e., 36844900 + 29398084 = 6070^2 + 5422^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (66242983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4140179 + ... + 4140194.

Almost surely, 2^66242984 is an apocalyptic number.

It is an amenable number.

66242984 is a deficient number, since it is larger than the sum of its proper divisors (57962626).

66242984 is a wasteful number, since it uses less digits than its factorization.

66242984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8280379 (or 8280375 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 66242984 is about 8138.9792971846. The cubic root of 66242984 is about 404.6193324029.

The spelling of 66242984 in words is "sixty-six million, two hundred forty-two thousand, nine hundred eighty-four".