64966878 has 48 divisors (see below), whose sum is σ = 147341376. Its totient is φ = 20666880.

The previous prime is 64966859. The next prime is 64966883. The reversal of 64966878 is 87866946.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33750 + ... + 35622.

It is an arithmetic number, because the mean of its divisors is an integer number (3069612).

Almost surely, 2^64966878 is an apocalyptic number.

64966878 is an abundant number, since it is smaller than the sum of its proper divisors (82374498).

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

64966878 is a wasteful number, since it uses less digits than its factorization.

64966878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969 (or 1966 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 64966878 is about 8060.2033473108. The cubic root of 64966878 is about 402.0042696509.

The spelling of 64966878 in words is "sixty-four million, nine hundred sixty-six thousand, eight hundred seventy-eight".