655499878 has 16 divisors (see below), whose sum is σ = 1073586960. Its totient is φ = 297690400.

The previous prime is 655499861. The next prime is 655499879. The reversal of 655499878 is 878994556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655499879) 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, 13368 + ... + 38596.

It is an arithmetic number, because the mean of its divisors is an integer number (67099185).

Almost surely, 2^655499878 is an apocalyptic number.

655499878 is a deficient number, since it is larger than the sum of its proper divisors (418087082).

655499878 is a wasteful number, since it uses less digits than its factorization.

655499878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26423.

The product of its digits is 21772800, while the sum is 61.

The square root of 655499878 is about 25602.7318464261. The cubic root of 655499878 is about 868.6754309786.

The spelling of 655499878 in words is "six hundred fifty-five million, four hundred ninety-nine thousand, eight hundred seventy-eight".