665674267 has 2 divisors, whose sum is σ = 665674268. Its totient is φ = 665674266.

The previous prime is 665674259. The next prime is 665674283. The reversal of 665674267 is 762476566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665674267 - 2³ = 665674259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665674267.

It is not a weakly prime, because it can be changed into another prime (665674297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332837133 + 332837134.

It is an arithmetic number, because the mean of its divisors is an integer number (332837134).

Almost surely, 2^665674267 is an apocalyptic number.

665674267 is a deficient number, since it is larger than the sum of its proper divisors (1).

665674267 is an equidigital number, since it uses as much as digits as its factorization.

665674267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 49.

The square root of 665674267 is about 25800.6640806007. The cubic root of 665674267 is about 873.1467789893.

The spelling of 665674267 in words is "six hundred sixty-five million, six hundred seventy-four thousand, two hundred sixty-seven".