895668661 has 2 divisors, whose sum is σ = 895668662. Its totient is φ = 895668660.

The previous prime is 895668649. The next prime is 895668671. The reversal of 895668661 is 166866598.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 866183761 + 29484900 = 29431^2 + 5430^2 .

It is a cyclic number.

It is not a de Polignac number, because 895668661 - 2¹⁷ = 895537589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (895668611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447834330 + 447834331.

It is an arithmetic number, because the mean of its divisors is an integer number (447834331).

Almost surely, 2^895668661 is an apocalyptic number.

It is an amenable number.

895668661 is a deficient number, since it is larger than the sum of its proper divisors (1).

895668661 is an equidigital number, since it uses as much as digits as its factorization.

895668661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 55.

The square root of 895668661 is about 29927.7239528836. The cubic root of 895668661 is about 963.9380555830.

The spelling of 895668661 in words is "eight hundred ninety-five million, six hundred sixty-eight thousand, six hundred sixty-one".