801663878 has 32 divisors (see below), whose sum is σ = 1283420160. Its totient is φ = 374885280.

The previous prime is 801663869. The next prime is 801663943. The reversal of 801663878 is 878366108.

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, 315473 + ... + 318003.

It is an arithmetic number, because the mean of its divisors is an integer number (40106880).

Almost surely, 2^801663878 is an apocalyptic number.

801663878 is a deficient number, since it is larger than the sum of its proper divisors (481756282).

801663878 is a wasteful number, since it uses less digits than its factorization.

801663878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 801663878 is about 28313.6694548764. The cubic root of 801663878 is about 928.9609075123.

The spelling of 801663878 in words is "eight hundred one million, six hundred sixty-three thousand, eight hundred seventy-eight".