66466864 has 20 divisors (see below), whose sum is σ = 135558040. Its totient is φ = 31484160.

The previous prime is 66466861. The next prime is 66466877. The reversal of 66466864 is 46866466.

66466864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66466861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109017 + ... + 109624.

It is an arithmetic number, because the mean of its divisors is an integer number (6777902).

Almost surely, 2^66466864 is an apocalyptic number.

It is an amenable number.

66466864 is an abundant number, since it is smaller than the sum of its proper divisors (69091176).

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

66466864 is a wasteful number, since it uses less digits than its factorization.

66466864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218668 (or 218662 counting only the distinct ones).

The product of its digits is 995328, while the sum is 46.

The square root of 66466864 is about 8152.7212634801. The cubic root of 66466864 is about 405.0746476234.

It can be divided in two parts, 664 and 66864, that added together give a triangular number (67528 = T₃₆₇).

The spelling of 66466864 in words is "sixty-six million, four hundred sixty-six thousand, eight hundred sixty-four".