66722412 has 48 divisors (see below), whose sum is σ = 160376832. Its totient is φ = 21577920.

The previous prime is 66722407. The next prime is 66722413. The reversal of 66722412 is 21422766.

It is a self number, because there is not a number n which added to its sum of digits gives 66722412.

It is not an unprimeable number, because it can be changed into a prime (66722413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98218 + ... + 98894.

It is an arithmetic number, because the mean of its divisors is an integer number (3341184).

Almost surely, 2^66722412 is an apocalyptic number.

It is an amenable number.

66722412 is an abundant number, since it is smaller than the sum of its proper divisors (93654420).

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

66722412 is a wasteful number, since it uses less digits than its factorization.

66722412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 916 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 66722412 is about 8168.3787865157. The cubic root of 66722412 is about 405.5931196776.

The spelling of 66722412 in words is "sixty-six million, seven hundred twenty-two thousand, four hundred twelve".