697078640880 has 320 divisors, whose sum is σ = 2529054796800. Its totient is φ = 175990164480.

The previous prime is 697078640833. The next prime is 697078640891. The reversal of 697078640880 is 88046870796.

697078640880 is a `hidden beast` number, since 6 + 9 + 70 + 7 + 86 + 408 + 80 = 666.

697078640880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×697078640880² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76370877 + ... + 76380003.

It is an arithmetic number, because the mean of its divisors is an integer number (7903296240).

Almost surely, 2^697078640880 is an apocalyptic number.

697078640880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 697078640880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1264527398400).

697078640880 is an abundant number, since it is smaller than the sum of its proper divisors (1831976155920).

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

697078640880 is a wasteful number, since it uses less digits than its factorization.

697078640880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11029 (or 11017 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 63.

The spelling of 697078640880 in words is "six hundred ninety-seven billion, seventy-eight million, six hundred forty thousand, eight hundred eighty".