666098603 has 4 divisors (see below), whose sum is σ = 666830688. Its totient is φ = 665366520.

The previous prime is 666098597. The next prime is 666098621. The reversal of 666098603 is 306890666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 666098603 - 2¹⁸ = 665836459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666098623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364676 + ... + 366497.

It is an arithmetic number, because the mean of its divisors is an integer number (166707672).

Almost surely, 2^666098603 is an apocalyptic number.

666098603 is a deficient number, since it is larger than the sum of its proper divisors (732085).

666098603 is an equidigital number, since it uses as much as digits as its factorization.

666098603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732084.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 666098603 is about 25808.8861247439. The cubic root of 666098603 is about 873.3322695667.

The spelling of 666098603 in words is "six hundred sixty-six million, ninety-eight thousand, six hundred three".