661098303 has 12 divisors (see below), whose sum is σ = 958321728. Its totient is φ = 439162080.

The previous prime is 661098299. The next prime is 661098311. The reversal of 661098303 is 303890166.

It is a happy number.

661098303 is a `hidden beast` number, since 6 + 610 + 9 + 8 + 30 + 3 = 666.

It is not a de Polignac number, because 661098303 - 2² = 661098299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661098353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128175 + ... + 133232.

It is an arithmetic number, because the mean of its divisors is an integer number (79860144).

Almost surely, 2^661098303 is an apocalyptic number.

661098303 is a deficient number, since it is larger than the sum of its proper divisors (297223425).

661098303 is a wasteful number, since it uses less digits than its factorization.

661098303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261694 (or 261691 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 661098303 is about 25711.8319650701. The cubic root of 661098303 is about 871.1414545715.

The spelling of 661098303 in words is "six hundred sixty-one million, ninety-eight thousand, three hundred three".