66313860 has 24 divisors (see below), whose sum is σ = 185678976. Its totient is φ = 17683680.

The previous prime is 66313837. The next prime is 66313861. The reversal of 66313860 is 6831366.

It is not an unprimeable number, because it can be changed into a prime (66313861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552556 + ... + 552675.

It is an arithmetic number, because the mean of its divisors is an integer number (7736624).

Almost surely, 2^66313860 is an apocalyptic number.

66313860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66313860 is an abundant number, since it is smaller than the sum of its proper divisors (119365116).

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

66313860 is a wasteful number, since it uses less digits than its factorization.

66313860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105243 (or 1105241 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 66313860 is about 8143.3322417792. The cubic root of 66313860 is about 404.7635870661.

The spelling of 66313860 in words is "sixty-six million, three hundred thirteen thousand, eight hundred sixty".