1226665550 has 24 divisors (see below), whose sum is σ = 2489017032. Its totient is φ = 446060000.

The previous prime is 1226665541. The next prime is 1226665579. The reversal of 1226665550 is 555666221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1114601 + ... + 1115700.

It is an arithmetic number, because the mean of its divisors is an integer number (103709043).

Almost surely, 2^1226665550 is an apocalyptic number.

1226665550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1226665550 is an abundant number, since it is smaller than the sum of its proper divisors (1262351482).

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

1226665550 is a wasteful number, since it uses less digits than its factorization.

1226665550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230324 (or 2230319 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 1226665550 is about 35023.7854892928. The cubic root of 1226665550 is about 1070.4721909277.

The spelling of 1226665550 in words is "one billion, two hundred twenty-six million, six hundred sixty-five thousand, five hundred fifty".