66375612 has 60 divisors (see below), whose sum is σ = 174312600. Its totient is φ = 22024224.

The previous prime is 66375593. The next prime is 66375613. The reversal of 66375612 is 21657366.

66375612 is a `hidden beast` number, since 6 + 6 + 37 + 5 + 612 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66375613) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 112783 + ... + 113369.

It is an arithmetic number, because the mean of its divisors is an integer number (2905210).

Almost surely, 2^66375612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66375612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87156300).

66375612 is an abundant number, since it is smaller than the sum of its proper divisors (107936988).

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

66375612 is a wasteful number, since it uses less digits than its factorization.

66375612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 941 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 66375612 is about 8147.1229277580. The cubic root of 66375612 is about 404.8891877904.

The spelling of 66375612 in words is "sixty-six million, three hundred seventy-five thousand, six hundred twelve".