661184011 has 4 divisors (see below), whose sum is σ = 661236232. Its totient is φ = 661131792.

The previous prime is 661183981. The next prime is 661184023. The reversal of 661184011 is 110481166.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-661184011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661184411) 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, 6256 + ... + 36898.

It is an arithmetic number, because the mean of its divisors is an integer number (165309058).

Almost surely, 2^661184011 is an apocalyptic number.

661184011 is a deficient number, since it is larger than the sum of its proper divisors (52221).

661184011 is a wasteful number, since it uses less digits than its factorization.

661184011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52220.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 661184011 is about 25713.4986145410. The cubic root of 661184011 is about 871.1790992833.

The spelling of 661184011 in words is "six hundred sixty-one million, one hundred eighty-four thousand, eleven".