66530808 has 80 divisors (see below), whose sum is σ = 188745480. Its totient is φ = 21892032.

The previous prime is 66530759. The next prime is 66530831. The reversal of 66530808 is 80803566.

66530808 is nontrivially palindromic in base 11.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 53166 + ... + 54402.

Almost surely, 2^66530808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66530808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94372740).

66530808 is an abundant number, since it is smaller than the sum of its proper divisors (122214672).

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

66530808 is a wasteful number, since it uses less digits than its factorization.

66530808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338 (or 1325 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 66530808 is about 8156.6419560993. The cubic root of 66530808 is about 405.2045057704.

The spelling of 66530808 in words is "sixty-six million, five hundred thirty thousand, eight hundred eight".