665615003 has 2 divisors, whose sum is σ = 665615004. Its totient is φ = 665615002.

The previous prime is 665614993. The next prime is 665615023. The reversal of 665615003 is 300516566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665615003 - 2²⁸ = 397179547 is a prime.

It is not a weakly prime, because it can be changed into another prime (665615023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332807501 + 332807502.

It is an arithmetic number, because the mean of its divisors is an integer number (332807502).

Almost surely, 2^665615003 is an apocalyptic number.

665615003 is a deficient number, since it is larger than the sum of its proper divisors (1).

665615003 is an equidigital number, since it uses as much as digits as its factorization.

665615003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 665615003 is about 25799.5155574674. The cubic root of 665615003 is about 873.1208665628.

The spelling of 665615003 in words is "six hundred sixty-five million, six hundred fifteen thousand, three".