1266276960 has 576 divisors, whose sum is σ = 5171257728. Its totient is φ = 278986752.

The previous prime is 1266276919. The next prime is 1266276971. The reversal of 1266276960 is 696726621.

1266276960 is a `hidden beast` number, since 12 + 6 + 627 + 6 + 9 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7319434 + ... + 7319606.

It is an arithmetic number, because the mean of its divisors is an integer number (8977878).

Almost surely, 2^1266276960 is an apocalyptic number.

1266276960 is a gapful number since it is divisible by the number (10) 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 1266276960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2585628864).

1266276960 is an abundant number, since it is smaller than the sum of its proper divisors (3904980768).

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

1266276960 is a wasteful number, since it uses less digits than its factorization.

1266276960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 1266276960 is about 35584.7855129127. The cubic root of 1266276960 is about 1081.8728819517.

The spelling of 1266276960 in words is "one billion, two hundred sixty-six million, two hundred seventy-six thousand, nine hundred sixty".