665073403 has 2 divisors, whose sum is σ = 665073404. Its totient is φ = 665073402.

The previous prime is 665073377. The next prime is 665073407. The reversal of 665073403 is 304370566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665073403 is a prime.

It is not a weakly prime, because it can be changed into another prime (665073407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332536701 + 332536702.

It is an arithmetic number, because the mean of its divisors is an integer number (332536702).

Almost surely, 2^665073403 is an apocalyptic number.

665073403 is a deficient number, since it is larger than the sum of its proper divisors (1).

665073403 is an equidigital number, since it uses as much as digits as its factorization.

665073403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 34.

The square root of 665073403 is about 25789.0171003084. The cubic root of 665073403 is about 872.8839875982.

The spelling of 665073403 in words is "six hundred sixty-five million, seventy-three thousand, four hundred three".