66121304 has 16 divisors (see below), whose sum is σ = 125371800. Its totient is φ = 32688832.

The previous prime is 66121303. The next prime is 66121309. The reversal of 66121304 is 40312166.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66121304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66121301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45722 + ... + 47145.

Almost surely, 2^66121304 is an apocalyptic number.

It is an amenable number.

66121304 is a deficient number, since it is larger than the sum of its proper divisors (59250496).

66121304 is a wasteful number, since it uses less digits than its factorization.

66121304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92962 (or 92958 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 66121304 is about 8131.5007224989. The cubic root of 66121304 is about 404.3714356759.

The spelling of 66121304 in words is "sixty-six million, one hundred twenty-one thousand, three hundred four".