1266622544 has 40 divisors (see below), whose sum is σ = 2721090720. Its totient is φ = 566294400.

The previous prime is 1266622543. The next prime is 1266622547. The reversal of 1266622544 is 4452266621.

It is a junction number, because it is equal to n+sod(n) for n = 1266622498 and 1266622507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266622541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48254 + ... + 69725.

It is an arithmetic number, because the mean of its divisors is an integer number (68027268).

Almost surely, 2^1266622544 is an apocalyptic number.

It is an amenable number.

1266622544 is an abundant number, since it is smaller than the sum of its proper divisors (1454468176).

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

1266622544 is a wasteful number, since it uses less digits than its factorization.

1266622544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118059 (or 118053 counting only the distinct ones).

The product of its digits is 138240, while the sum is 38.

The square root of 1266622544 is about 35589.6409647527. The cubic root of 1266622544 is about 1081.9712922160.

The spelling of 1266622544 in words is "one billion, two hundred sixty-six million, six hundred twenty-two thousand, five hundred forty-four".