696505878 has 80 divisors (see below), whose sum is σ = 1687967424. Its totient is φ = 213822720.

The previous prime is 696505877. The next prime is 696505903. The reversal of 696505878 is 878505696.

696505878 is a `hidden beast` number, since 6 + 9 + 6 + 50 + 587 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (696505877) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 126748 + ... + 132128.

Almost surely, 2^696505878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 696505878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (843983712).

696505878 is an abundant number, since it is smaller than the sum of its proper divisors (991461546).

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

696505878 is a wasteful number, since it uses less digits than its factorization.

696505878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5459 (or 5450 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The square root of 696505878 is about 26391.3978030721. The cubic root of 696505878 is about 886.4241820632.

The spelling of 696505878 in words is "six hundred ninety-six million, five hundred five thousand, eight hundred seventy-eight".