1226666406 has 64 divisors (see below), whose sum is σ = 2935784448. Its totient is φ = 334084608.

The previous prime is 1226666393. The next prime is 1226666407. The reversal of 1226666406 is 6046666221.

It is a super-3 number, since 3×1226666406³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226666407) 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, 300330 + ... + 304386.

It is an arithmetic number, because the mean of its divisors is an integer number (45871632).

Almost surely, 2^1226666406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1226666406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1467892224).

1226666406 is an abundant number, since it is smaller than the sum of its proper divisors (1709118042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1226666406 is a wasteful number, since it uses less digits than its factorization.

1226666406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4405.

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 1226666406 is about 35023.7977095574. The cubic root of 1226666406 is about 1070.4724399290.

The spelling of 1226666406 in words is "one billion, two hundred twenty-six million, six hundred sixty-six thousand, four hundred six".