66859452 has 96 divisors (see below), whose sum is σ = 190794240. Its totient is φ = 20079360.

The previous prime is 66859451. The next prime is 66859469. The reversal of 66859452 is 25495866.

66859452 is a `hidden beast` number, since 6 + 6 + 8 + 594 + 52 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 66859398 and 66859407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66859451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198228 + ... + 198564.

It is an arithmetic number, because the mean of its divisors is an integer number (1987440).

Almost surely, 2^66859452 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 66859452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95397120).

66859452 is an abundant number, since it is smaller than the sum of its proper divisors (123934788).

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

66859452 is a wasteful number, since it uses less digits than its factorization.

66859452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 520 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 66859452 is about 8176.7629291792. The cubic root of 66859452 is about 405.8706100016.

The spelling of 66859452 in words is "sixty-six million, eight hundred fifty-nine thousand, four hundred fifty-two".