897806705670 has 192 divisors, whose sum is σ = 2794117455360. Its totient is φ = 204543589824.

The previous prime is 897806705629. The next prime is 897806705681. The reversal of 897806705670 is 76507608798.

897806705670 is a `hidden beast` number, since 8 + 9 + 7 + 8 + 0 + 67 + 0 + 567 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 897806705598 and 897806705607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3951087 + ... + 4172133.

It is an arithmetic number, because the mean of its divisors is an integer number (14552695080).

Almost surely, 2^897806705670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 897806705670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1397058727680).

897806705670 is an abundant number, since it is smaller than the sum of its proper divisors (1896310749690).

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

897806705670 is a wasteful number, since it uses less digits than its factorization.

897806705670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221384 (or 221371 counting only the distinct ones).

The product of its (nonzero) digits is 35562240, while the sum is 63.

The spelling of 897806705670 in words is "eight hundred ninety-seven billion, eight hundred six million, seven hundred five thousand, six hundred seventy".