2206665651 has 32 divisors (see below), whose sum is σ = 3137587200. Its totient is φ = 1377129600.

The previous prime is 2206665647. The next prime is 2206665673. The reversal of 2206665651 is 1565666022.

It is a happy number.

It is not a de Polignac number, because 2206665651 - 2² = 2206665647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2206665611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 443226 + ... + 448176.

It is an arithmetic number, because the mean of its divisors is an integer number (98049600).

Almost surely, 2^2206665651 is an apocalyptic number.

2206665651 is a deficient number, since it is larger than the sum of its proper divisors (930921549).

2206665651 is a wasteful number, since it uses less digits than its factorization.

2206665651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5139.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 2206665651 is about 46975.1599358640. The cubic root of 2206665651 is about 1301.9036510731.

The spelling of 2206665651 in words is "two billion, two hundred six million, six hundred sixty-five thousand, six hundred fifty-one".