1266360606720 has 672 divisors, whose sum is σ = 4828523581440. Its totient is φ = 304455352320.

The previous prime is 1266360606671. The next prime is 1266360606733. The reversal of 1266360606720 is 276060636621.

1266360606720 is a `hidden beast` number, since 1 + 2 + 6 + 6 + 36 + 0 + 606 + 7 + 2 + 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 47 ways as a sum of consecutive naturals, for example, 514988851 + ... + 514991309.

Almost surely, 2^{1266360606720} is an apocalyptic number.

1266360606720 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 1266360606720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2414261790720).

1266360606720 is an abundant number, since it is smaller than the sum of its proper divisors (3562162974720).

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

1266360606720 is a wasteful number, since it uses less digits than its factorization.

1266360606720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634 (or 2607 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

It can be divided in two parts, 1266360 and 606720, that added together give a triangular number (1873080 = T₁₉₃₅).

The spelling of 1266360606720 in words is "one trillion, two hundred sixty-six billion, three hundred sixty million, six hundred six thousand, seven hundred twenty".