66722612 has 24 divisors (see below), whose sum is σ = 127660512. Its totient is φ = 30261600.

The previous prime is 66722611. The next prime is 66722651. The reversal of 66722612 is 21622766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66722611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22403 + ... + 25205.

It is an arithmetic number, because the mean of its divisors is an integer number (5319188).

Almost surely, 2^66722612 is an apocalyptic number.

It is an amenable number.

66722612 is a deficient number, since it is larger than the sum of its proper divisors (60937900).

66722612 is a wasteful number, since it uses less digits than its factorization.

66722612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359 (or 3357 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 66722612 is about 8168.3910288379. The cubic root of 66722612 is about 405.5935249314.

The spelling of 66722612 in words is "sixty-six million, seven hundred twenty-two thousand, six hundred twelve".