6633440661 has 8 divisors (see below), whose sum is σ = 8845865280. Its totient is φ = 4421654912.

The previous prime is 6633440641. The next prime is 6633440677. The reversal of 6633440661 is 1660443366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6633440661 - 2¹¹ = 6633438613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6633440641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134940 + ... + 177413.

It is an arithmetic number, because the mean of its divisors is an integer number (1105733160).

Almost surely, 2^6633440661 is an apocalyptic number.

It is an amenable number.

6633440661 is a deficient number, since it is larger than the sum of its proper divisors (2212424619).

6633440661 is a wasteful number, since it uses less digits than its factorization.

6633440661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319435.

The product of its (nonzero) digits is 186624, while the sum is 39.

The square root of 6633440661 is about 81445.9370441522. The cubic root of 6633440661 is about 1878.9401621232.

The spelling of 6633440661 in words is "six billion, six hundred thirty-three million, four hundred forty thousand, six hundred sixty-one".