665470028123 has 2 divisors, whose sum is σ = 665470028124. Its totient is φ = 665470028122.

The previous prime is 665470028117. The next prime is 665470028191. The reversal of 665470028123 is 321820074566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665470028123 - 2¹⁸ = 665469765979 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (665470228123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332735014061 + 332735014062.

It is an arithmetic number, because the mean of its divisors is an integer number (332735014062).

Almost surely, 2^665470028123 is an apocalyptic number.

665470028123 is a deficient number, since it is larger than the sum of its proper divisors (1).

665470028123 is an equidigital number, since it uses as much as digits as its factorization.

665470028123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 665470028123 in words is "six hundred sixty-five billion, four hundred seventy million, twenty-eight thousand, one hundred twenty-three".