866084477 has 2 divisors, whose sum is σ = 866084478. Its totient is φ = 866084476.

The previous prime is 866084447. The next prime is 866084489. The reversal of 866084477 is 774480668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 462637081 + 403447396 = 21509^2 + 20086^2 .

It is a cyclic number.

It is not a de Polignac number, because 866084477 - 2⁶ = 866084413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866084407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433042238 + 433042239.

It is an arithmetic number, because the mean of its divisors is an integer number (433042239).

Almost surely, 2^866084477 is an apocalyptic number.

It is an amenable number.

866084477 is a deficient number, since it is larger than the sum of its proper divisors (1).

866084477 is an equidigital number, since it uses as much as digits as its factorization.

866084477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1806336, while the sum is 50.

The square root of 866084477 is about 29429.3132267812. The cubic root of 866084477 is about 953.2059653331.

The spelling of 866084477 in words is "eight hundred sixty-six million, eighty-four thousand, four hundred seventy-seven".