89666657 has 2 divisors, whose sum is σ = 89666658. Its totient is φ = 89666656.

The previous prime is 89666641. The next prime is 89666677. The reversal of 89666657 is 75666698.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65302561 + 24364096 = 8081^2 + 4936^2 .

It is a cyclic number.

It is not a de Polignac number, because 89666657 - 2⁴ = 89666641 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 89666599 and 89666608.

It is not a weakly prime, because it can be changed into another prime (89666617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44833328 + 44833329.

It is an arithmetic number, because the mean of its divisors is an integer number (44833329).

Almost surely, 2^89666657 is an apocalyptic number.

It is an amenable number.

89666657 is a deficient number, since it is larger than the sum of its proper divisors (1).

89666657 is an equidigital number, since it uses as much as digits as its factorization.

89666657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 53.

The square root of 89666657 is about 9469.2479638037. The cubic root of 89666657 is about 447.5865142804.

The spelling of 89666657 in words is "eighty-nine million, six hundred sixty-six thousand, six hundred fifty-seven".