66673608 has 16 divisors (see below), whose sum is σ = 166684080. Its totient is φ = 22224528.

The previous prime is 66673583. The next prime is 66673613. The reversal of 66673608 is 80637666.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66673608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389010 + ... + 1389057.

It is an arithmetic number, because the mean of its divisors is an integer number (10417755).

Almost surely, 2^66673608 is an apocalyptic number.

It is an amenable number.

66673608 is an abundant number, since it is smaller than the sum of its proper divisors (100010472).

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

66673608 is a wasteful number, since it uses less digits than its factorization.

66673608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778076 (or 2778072 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 66673608 is about 8165.3908663333. The cubic root of 66673608 is about 405.4942054137.

The spelling of 66673608 in words is "sixty-six million, six hundred seventy-three thousand, six hundred eight".