866459537 has 2 divisors, whose sum is σ = 866459538. Its totient is φ = 866459536.

The previous prime is 866459521. The next prime is 866459563. The reversal of 866459537 is 735954668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 650046016 + 216413521 = 25496^2 + 14711^2 .

It is a cyclic number.

It is not a de Polignac number, because 866459537 - 2⁴ = 866459521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (866459837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433229768 + 433229769.

It is an arithmetic number, because the mean of its divisors is an integer number (433229769).

Almost surely, 2^866459537 is an apocalyptic number.

It is an amenable number.

866459537 is a deficient number, since it is larger than the sum of its proper divisors (1).

866459537 is an equidigital number, since it uses as much as digits as its factorization.

866459537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 53.

The square root of 866459537 is about 29435.6847550724. The cubic root of 866459537 is about 953.3435415336.

The spelling of 866459537 in words is "eight hundred sixty-six million, four hundred fifty-nine thousand, five hundred thirty-seven".