6600604661 has 16 divisors (see below), whose sum is σ = 7803002880. Its totient is φ = 5463825840.

The previous prime is 6600604639. The next prime is 6600604663. The reversal of 6600604661 is 1664060066.

It is a cyclic number.

It is not a de Polignac number, because 6600604661 - 2³⁰ = 5526862837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6600604663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74450 + ... + 136908.

It is an arithmetic number, because the mean of its divisors is an integer number (487687680).

Almost surely, 2^6600604661 is an apocalyptic number.

It is an amenable number.

6600604661 is a deficient number, since it is larger than the sum of its proper divisors (1202398219).

6600604661 is a wasteful number, since it uses less digits than its factorization.

6600604661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62984.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 6600604661 is about 81244.1053923298. The cubic root of 6600604661 is about 1875.8347369243.

The spelling of 6600604661 in words is "six billion, six hundred million, six hundred four thousand, six hundred sixty-one".