2221366651 has 8 divisors (see below), whose sum is σ = 2546023680. Its totient is φ = 1898539368.

The previous prime is 2221366613. The next prime is 2221366711. The reversal of 2221366651 is 1566631222.

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 2221366651 - 2¹⁷ = 2221235579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221361651) 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, 454831 + ... + 459688.

It is an arithmetic number, because the mean of its divisors is an integer number (318252960).

Almost surely, 2^2221366651 is an apocalyptic number.

2221366651 is a deficient number, since it is larger than the sum of its proper divisors (324657029).

2221366651 is an equidigital number, since it uses as much as digits as its factorization.

2221366651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914873.

The product of its digits is 25920, while the sum is 34.

The square root of 2221366651 is about 47131.3765022835. The cubic root of 2221366651 is about 1304.7883864877.

Adding to 2221366651 its reverse (1566631222), we get a palindrome (3787997873).

The spelling of 2221366651 in words is "two billion, two hundred twenty-one million, three hundred sixty-six thousand, six hundred fifty-one".