1226756664 has 160 divisors (see below), whose sum is σ = 3947407200. Its totient is φ = 348675840.

The previous prime is 1226756659. The next prime is 1226756747. The reversal of 1226756664 is 4666576221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1038154 + ... + 1039334.

It is an arithmetic number, because the mean of its divisors is an integer number (24671295).

Almost surely, 2^1226756664 is an apocalyptic number.

1226756664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1226756664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1973703600).

1226756664 is an abundant number, since it is smaller than the sum of its proper divisors (2720650536).

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

1226756664 is a wasteful number, since it uses less digits than its factorization.

1226756664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435 (or 1422 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 1226756664 is about 35025.0862097440. The cubic root of 1226756664 is about 1070.4986943726.

The spelling of 1226756664 in words is "one billion, two hundred twenty-six million, seven hundred fifty-six thousand, six hundred sixty-four".