1266667484400 has 90 divisors (see below), whose sum is σ = 4395688035440. Its totient is φ = 337777994880.

The previous prime is 1266667484389. The next prime is 1266667484413. The reversal of 1266667484400 is 44847666621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (90).

It is a super-3 number, since 3×1266667484400³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 175922440 + ... + 175929639.

Almost surely, 2^{1266667484400} is an apocalyptic number.

1266667484400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266667484400 is an abundant number, since it is smaller than the sum of its proper divisors (3129020551040).

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

1266667484400 is a wasteful number, since it uses less digits than its factorization.

1266667484400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351852103 (or 351852089 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 1266667484400 in words is "one trillion, two hundred sixty-six billion, six hundred sixty-seven million, four hundred eighty-four thousand, four hundred".