66606984 has 24 divisors (see below), whose sum is σ = 180394110. Its totient is φ = 22202304.

The previous prime is 66606979. The next prime is 66607007. The reversal of 66606984 is 48960666.

It can be written as a sum of positive squares in only one way, i.e., 57426084 + 9180900 = 7578^2 + 3030^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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, 462477 + ... + 462620.

Almost surely, 2^66606984 is an apocalyptic number.

It is an amenable number.

66606984 is an abundant number, since it is smaller than the sum of its proper divisors (113787126).

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

66606984 is a wasteful number, since it uses less digits than its factorization.

66606984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925109 (or 925102 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 66606984 is about 8161.3101889341. The cubic root of 66606984 is about 405.3590962339.

The spelling of 66606984 in words is "sixty-six million, six hundred six thousand, nine hundred eighty-four".