66413120 has 28 divisors (see below), whose sum is σ = 158147004. Its totient is φ = 26565120.

The previous prime is 66413089. The next prime is 66413131. The reversal of 66413120 is 2131466.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 43983424 + 22429696 = 6632^2 + 4736^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103451 + ... + 104090.

Almost surely, 2^66413120 is an apocalyptic number.

It is an amenable number.

66413120 is an abundant number, since it is smaller than the sum of its proper divisors (91733884).

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

66413120 is a wasteful number, since it uses less digits than its factorization.

66413120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207558 (or 207548 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 66413120 is about 8149.4245195596. The cubic root of 66413120 is about 404.9654393107.

Adding to 66413120 its reverse (2131466), we get a palindrome (68544586).

The spelling of 66413120 in words is "sixty-six million, four hundred thirteen thousand, one hundred twenty".