66960296 has 16 divisors (see below), whose sum is σ = 135208500. Its totient is φ = 30904704.

The previous prime is 66960293. The next prime is 66960301. The reversal of 66960296 is 69206966.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 54612100 + 12348196 = 7390^2 + 3514^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66960293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321821 + ... + 322028.

Almost surely, 2^66960296 is an apocalyptic number.

It is an amenable number.

66960296 is an abundant number, since it is smaller than the sum of its proper divisors (68248204).

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

66960296 is a wasteful number, since it uses less digits than its factorization.

66960296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643868 (or 643864 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 66960296 is about 8182.9271046490. The cubic root of 66960296 is about 406.0745654822.

The spelling of 66960296 in words is "sixty-six million, nine hundred sixty thousand, two hundred ninety-six".