1266668213 has 16 divisors (see below), whose sum is σ = 1338163200. Its totient is φ = 1196635440.

The previous prime is 1266668209. The next prime is 1266668251. The reversal of 1266668213 is 3128666621.

It is a cyclic number.

It is not a de Polignac number, because 1266668213 - 2² = 1266668209 is a prime.

It is a super-2 number, since 2×1266668213² = 3208896723649226738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266661213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 719228 + ... + 720986.

It is an arithmetic number, because the mean of its divisors is an integer number (83635200).

Almost surely, 2^1266668213 is an apocalyptic number.

It is an amenable number.

1266668213 is a deficient number, since it is larger than the sum of its proper divisors (71494987).

1266668213 is a wasteful number, since it uses less digits than its factorization.

1266668213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152.

The product of its digits is 124416, while the sum is 41.

The square root of 1266668213 is about 35590.2825642056. The cubic root of 1266668213 is about 1081.9842958145.

The spelling of 1266668213 in words is "one billion, two hundred sixty-six million, six hundred sixty-eight thousand, two hundred thirteen".