66623612 has 24 divisors (see below), whose sum is σ = 134673840. Its totient is φ = 28501760.

The previous prime is 66623611. The next prime is 66623639. The reversal of 66623612 is 21632666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66623611) 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, 43787 + ... + 45282.

It is an arithmetic number, because the mean of its divisors is an integer number (5611410).

Almost surely, 2^66623612 is an apocalyptic number.

It is an amenable number.

66623612 is an abundant number, since it is smaller than the sum of its proper divisors (68050228).

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

66623612 is a wasteful number, since it uses less digits than its factorization.

66623612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89101 (or 89099 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

The square root of 66623612 is about 8162.3288343462. The cubic root of 66623612 is about 405.3928251806.

The spelling of 66623612 in words is "sixty-six million, six hundred twenty-three thousand, six hundred twelve".