66411320 has 16 divisors (see below), whose sum is σ = 149425560. Its totient is φ = 26564512.

The previous prime is 66411277. The next prime is 66411353. The reversal of 66411320 is 2311466.

It is a happy number.

It is a congruent number.

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, 830102 + ... + 830181.

Almost surely, 2^66411320 is an apocalyptic number.

It is an amenable number.

66411320 is an abundant number, since it is smaller than the sum of its proper divisors (83014240).

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

66411320 is a wasteful number, since it uses less digits than its factorization.

66411320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660294 (or 1660290 counting only the distinct ones).

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

The square root of 66411320 is about 8149.3140815654. The cubic root of 66411320 is about 404.9617806743.

Adding to 66411320 its reverse (2311466), we get a palindrome (68722786).

The spelling of 66411320 in words is "sixty-six million, four hundred eleven thousand, three hundred twenty".