666072503 has 2 divisors, whose sum is σ = 666072504. Its totient is φ = 666072502.

The previous prime is 666072499. The next prime is 666072587. The reversal of 666072503 is 305270666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666072503 - 2² = 666072499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666072103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333036251 + 333036252.

It is an arithmetic number, because the mean of its divisors is an integer number (333036252).

Almost surely, 2^666072503 is an apocalyptic number.

666072503 is a deficient number, since it is larger than the sum of its proper divisors (1).

666072503 is an equidigital number, since it uses as much as digits as its factorization.

666072503 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 35.

The square root of 666072503 is about 25808.3804799914. The cubic root of 666072503 is about 873.3208627119.

The spelling of 666072503 in words is "six hundred sixty-six million, seventy-two thousand, five hundred three".