866272637 has 2 divisors, whose sum is σ = 866272638. Its totient is φ = 866272636.

The previous prime is 866272609. The next prime is 866272663. The reversal of 866272637 is 736272668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 865889476 + 383161 = 29426^2 + 619^2 .

It is a cyclic number.

It is not a de Polignac number, because 866272637 - 2⁶ = 866272573 is a prime.

It is a super-2 number, since 2×866272637² = 1500856563229867538, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 866272591 and 866272600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866272607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433136318 + 433136319.

It is an arithmetic number, because the mean of its divisors is an integer number (433136319).

Almost surely, 2^866272637 is an apocalyptic number.

It is an amenable number.

866272637 is a deficient number, since it is larger than the sum of its proper divisors (1).

866272637 is an equidigital number, since it uses as much as digits as its factorization.

866272637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 47.

The square root of 866272637 is about 29432.5098657930. The cubic root of 866272637 is about 953.2749894881.

The spelling of 866272637 in words is "eight hundred sixty-six million, two hundred seventy-two thousand, six hundred thirty-seven".