6401222266 has 8 divisors (see below), whose sum is σ = 9610621524. Its totient is φ = 3197681760.

The previous prime is 6401222263. The next prime is 6401222291. The reversal of 6401222266 is 6622221046.

It can be written as a sum of positive squares in 2 ways, for example, as 6151108041 + 250114225 = 78429^2 + 15815^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6401222263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1461955 + ... + 1466326.

Almost surely, 2^6401222266 is an apocalyptic number.

6401222266 is a deficient number, since it is larger than the sum of its proper divisors (3209399258).

6401222266 is a wasteful number, since it uses less digits than its factorization.

6401222266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2929376.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 6401222266 is about 80007.6387978048. The cubic root of 6401222266 is about 1856.7537187597.

The spelling of 6401222266 in words is "six billion, four hundred one million, two hundred twenty-two thousand, two hundred sixty-six".