66290080 has 24 divisors (see below), whose sum is σ = 156610692. Its totient is φ = 26515968.

The previous prime is 66290039. The next prime is 66290083. The reversal of 66290080 is 8009266.

It can be written as a sum of positive squares in 2 ways, for example, as 64064016 + 2226064 = 8004^2 + 1492^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (66290083) 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, 206997 + ... + 207316.

Almost surely, 2^66290080 is an apocalyptic number.

It is an amenable number.

66290080 is an abundant number, since it is smaller than the sum of its proper divisors (90320612).

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

66290080 is a wasteful number, since it uses less digits than its factorization.

66290080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414328 (or 414320 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 66290080 is about 8141.8720206105. The cubic root of 66290080 is about 404.7151988465.

The spelling of 66290080 in words is "sixty-six million, two hundred ninety thousand, eighty".