6651806361 has 8 divisors (see below), whose sum is σ = 8870004864. Its totient is φ = 4434072720.

The previous prime is 6651806351. The next prime is 6651806363. The reversal of 6651806361 is 1636081566.

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

It is not a de Polignac number, because 6651806361 - 2¹⁰ = 6651805337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6651806363) 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, 81330 + ... + 141131.

It is an arithmetic number, because the mean of its divisors is an integer number (1108750608).

Almost surely, 2^6651806361 is an apocalyptic number.

It is an amenable number.

6651806361 is a deficient number, since it is larger than the sum of its proper divisors (2218198503).

6651806361 is a wasteful number, since it uses less digits than its factorization.

6651806361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232431.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 6651806361 is about 81558.6069093876. The cubic root of 6651806361 is about 1880.6726091314.

The spelling of 6651806361 in words is "six billion, six hundred fifty-one million, eight hundred six thousand, three hundred sixty-one".