1264006666420 has 48 divisors (see below), whose sum is σ = 2711159781120. Its totient is φ = 494796081024.

The previous prime is 1264006666397. The next prime is 1264006666441. The reversal of 1264006666420 is 246666004621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10266586 + ... + 10388974.

It is an arithmetic number, because the mean of its divisors is an integer number (56482495440).

Almost surely, 2^{1264006666420} is an apocalyptic number.

1264006666420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264006666420 is an abundant number, since it is smaller than the sum of its proper divisors (1447153114700).

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

1264006666420 is a wasteful number, since it uses less digits than its factorization.

1264006666420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133432 (or 133430 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 1264006666420 in words is "one trillion, two hundred sixty-four billion, six million, six hundred sixty-six thousand, four hundred twenty".