66363878 has 32 divisors (see below), whose sum is σ = 121499136. Its totient is φ = 26566848.

The previous prime is 66363863. The next prime is 66363881. The reversal of 66363878 is 87836366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11450 + ... + 16242.

It is an arithmetic number, because the mean of its divisors is an integer number (3796848).

Almost surely, 2^66363878 is an apocalyptic number.

66363878 is a deficient number, since it is larger than the sum of its proper divisors (55135258).

66363878 is a wasteful number, since it uses less digits than its factorization.

66363878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4868.

The product of its digits is 870912, while the sum is 47.

The square root of 66363878 is about 8146.4027644108. The cubic root of 66363878 is about 404.8653273715.

The spelling of 66363878 in words is "sixty-six million, three hundred sixty-three thousand, eight hundred seventy-eight".