666279463 has 2 divisors, whose sum is σ = 666279464. Its totient is φ = 666279462.

The previous prime is 666279421. The next prime is 666279469. The reversal of 666279463 is 364972666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666279463 - 2¹⁷ = 666148391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666279469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333139731 + 333139732.

It is an arithmetic number, because the mean of its divisors is an integer number (333139732).

Almost surely, 2^666279463 is an apocalyptic number.

666279463 is a deficient number, since it is larger than the sum of its proper divisors (1).

666279463 is an equidigital number, since it uses as much as digits as its factorization.

666279463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 49.

The square root of 666279463 is about 25812.3897188927. The cubic root of 666279463 is about 873.4113052029.

The spelling of 666279463 in words is "six hundred sixty-six million, two hundred seventy-nine thousand, four hundred sixty-three".