677212878 has 16 divisors (see below), whose sum is σ = 1367837136. Its totient is φ = 223502400.

The previous prime is 677212873. The next prime is 677212883. The reversal of 677212878 is 878212776.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (677212873) and next prime (677212883).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677212873) 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, 558151 + ... + 559362.

It is an arithmetic number, because the mean of its divisors is an integer number (85489821).

Almost surely, 2^677212878 is an apocalyptic number.

677212878 is an abundant number, since it is smaller than the sum of its proper divisors (690624258).

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

677212878 is a wasteful number, since it uses less digits than its factorization.

677212878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117619.

The product of its digits is 526848, while the sum is 48.

The square root of 677212878 is about 26023.3141240696. The cubic root of 677212878 is about 878.1628676198.

The spelling of 677212878 in words is "six hundred seventy-seven million, two hundred twelve thousand, eight hundred seventy-eight".