66580030 has 32 divisors (see below), whose sum is σ = 131090400. Its totient is φ = 24145920.

The previous prime is 66580013. The next prime is 66580043. The reversal of 66580030 is 3008566.

66580030 is a nontrivial binomial coefficient, being equal to C(11540, 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62946 + ... + 63994.

It is an arithmetic number, because the mean of its divisors is an integer number (4096575).

Almost surely, 2^66580030 is an apocalyptic number.

66580030 is the 11539-th triangular number and also the 5770-th hexagonal number.

66580030 is the 3847-th centered nonagonal number.

66580030 is a deficient number, since it is larger than the sum of its proper divisors (64510370).

66580030 is a wasteful number, since it uses less digits than its factorization.

66580030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 66580030 is about 8159.6586938425. The cubic root of 66580030 is about 405.3044096602.

Adding to 66580030 its reverse (3008566), we get a palindrome (69588596).

The spelling of 66580030 in words is "sixty-six million, five hundred eighty thousand, thirty".