66315804 has 24 divisors (see below), whose sum is σ = 158336640. Its totient is φ = 21591024.

The previous prime is 66315797. The next prime is 66315841. The reversal of 66315804 is 40851366.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63744 + ... + 64775.

It is an arithmetic number, because the mean of its divisors is an integer number (6597360).

Almost surely, 2^66315804 is an apocalyptic number.

It is an amenable number.

66315804 is an abundant number, since it is smaller than the sum of its proper divisors (92020836).

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

66315804 is a wasteful number, since it uses less digits than its factorization.

66315804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128569 (or 128567 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 66315804 is about 8143.4516023612. The cubic root of 66315804 is about 404.7675422610.

The spelling of 66315804 in words is "sixty-six million, three hundred fifteen thousand, eight hundred four".