66700524 has 72 divisors (see below), whose sum is σ = 173746944. Its totient is φ = 19896800.

The previous prime is 66700523. The next prime is 66700541. The reversal of 66700524 is 42500766.

It is a junction number, because it is equal to n+sod(n) for n = 66700491 and 66700500.

It is not an unprimeable number, because it can be changed into a prime (66700523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102769 + ... + 103415.

It is an arithmetic number, because the mean of its divisors is an integer number (2413152).

Almost surely, 2^66700524 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 66700524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86873472).

66700524 is an abundant number, since it is smaller than the sum of its proper divisors (107046420).

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

66700524 is a wasteful number, since it uses less digits than its factorization.

66700524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 66700524 is about 8167.0388758717. The cubic root of 66700524 is about 405.5487638014.

The spelling of 66700524 in words is "sixty-six million, seven hundred thousand, five hundred twenty-four".