866421463 has 2 divisors, whose sum is σ = 866421464. Its totient is φ = 866421462.

The previous prime is 866421419. The next prime is 866421499. The reversal of 866421463 is 364124668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866421463 - 2²⁵ = 832867031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866421403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433210731 + 433210732.

It is an arithmetic number, because the mean of its divisors is an integer number (433210732).

Almost surely, 2^866421463 is an apocalyptic number.

866421463 is a deficient number, since it is larger than the sum of its proper divisors (1).

866421463 is an equidigital number, since it uses as much as digits as its factorization.

866421463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 40.

The square root of 866421463 is about 29435.0380159428. The cubic root of 866421463 is about 953.3295773756.

The spelling of 866421463 in words is "eight hundred sixty-six million, four hundred twenty-one thousand, four hundred sixty-three".