66968604 has 36 divisors (see below), whose sum is σ = 169740480. Its totient is φ = 22262400.

The previous prime is 66968591. The next prime is 66968609. The reversal of 66968604 is 40686966.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 66968604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66968609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12117 + ... + 16755.

Almost surely, 2^66968604 is an apocalyptic number.

It is an amenable number.

66968604 is an abundant number, since it is smaller than the sum of its proper divisors (102771876).

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

66968604 is a wasteful number, since it uses less digits than its factorization.

66968604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050 (or 5045 counting only the distinct ones).

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

The square root of 66968604 is about 8183.4347312116. The cubic root of 66968604 is about 406.0913591554.

The spelling of 66968604 in words is "sixty-six million, nine hundred sixty-eight thousand, six hundred four".