66298880 has 88 divisors (see below), whose sum is σ = 166249152. Its totient is φ = 25321472.

The previous prime is 66298879. The next prime is 66298907. The reversal of 66298880 is 8889266.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117479 + ... + 118041.

Almost surely, 2^66298880 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 66298880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83124576).

66298880 is an abundant number, since it is smaller than the sum of its proper divisors (99950272).

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

66298880 is a wasteful number, since it uses less digits than its factorization.

66298880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 66298880 is about 8142.4124189333. The cubic root of 66298880 is about 404.7331066851.

The spelling of 66298880 in words is "sixty-six million, two hundred ninety-eight thousand, eight hundred eighty".