66466878 has 16 divisors (see below), whose sum is σ = 133815936. Its totient is φ = 22008600.

The previous prime is 66466877. The next prime is 66466879. The reversal of 66466878 is 87866466.

It is an interprime number because it is at equal distance from previous prime (66466877) and next prime (66466879).

It is a self number, because there is not a number n which added to its sum of digits gives 66466878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66466877) 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, 35776 + ... + 37587.

It is an arithmetic number, because the mean of its divisors is an integer number (8363496).

Almost surely, 2^66466878 is an apocalyptic number.

66466878 is an abundant number, since it is smaller than the sum of its proper divisors (67349058).

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

66466878 is a wasteful number, since it uses less digits than its factorization.

66466878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73519.

The product of its digits is 2322432, while the sum is 51.

The square root of 66466878 is about 8152.7221220890. The cubic root of 66466878 is about 405.0746760638.

The spelling of 66466878 in words is "sixty-six million, four hundred sixty-six thousand, eight hundred seventy-eight".