897666005 has 6 divisors (see below), whose sum is σ = 1077279606. Its totient is φ = 718079208.

The previous prime is 897665987. The next prime is 897666043. The reversal of 897666005 is 500666798.

897666005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 718132804 + 179533201 = 26798^2 + 13399^2 .

It is not a de Polignac number, because 897666005 - 2⁶ = 897665941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60296 + ... + 73694.

It is an arithmetic number, because the mean of its divisors is an integer number (179546601).

Almost surely, 2^897666005 is an apocalyptic number.

It is an amenable number.

897666005 is a deficient number, since it is larger than the sum of its proper divisors (179613601).

897666005 is an frugal number, since it uses more digits than its factorization.

897666005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26803 (or 13404 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 897666005 is about 29961.0748305197. The cubic root of 897666005 is about 964.6540519451.

The spelling of 897666005 in words is "eight hundred ninety-seven million, six hundred sixty-six thousand, five".