1264740746166 has 320 divisors, whose sum is σ = 3054866006016. Its totient is φ = 390416241600.

The previous prime is 1264740746149. The next prime is 1264740746207. The reversal of 1264740746166 is 6616470474621.

1264740746166 is a `hidden beast` number, since 1 + 2 + 6 + 474 + 0 + 7 + 4 + 6 + 166 = 666.

It is a super-3 number, since 3×1264740746166³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2731621251 + ... + 2731621713.

Almost surely, 2^{1264740746166} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1264740746166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1527433003008).

1264740746166 is an abundant number, since it is smaller than the sum of its proper divisors (1790125259850).

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

1264740746166 is a wasteful number, since it uses less digits than its factorization.

1264740746166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 54.

The spelling of 1264740746166 in words is "one trillion, two hundred sixty-four billion, seven hundred forty million, seven hundred forty-six thousand, one hundred sixty-six".