13466787840 has 784 divisors, whose sum is σ = 54149615856. Its totient is φ = 3185049600.

The previous prime is 13466787823. The next prime is 13466787907. The reversal of 13466787840 is 4878766431.

13466787840 is a `hidden beast` number, since 1 + 3 + 466 + 78 + 78 + 40 = 666.

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 55 ways as a sum of consecutive naturals, for example, 328458220 + ... + 328458260.

Almost surely, 2^13466787840 is an apocalyptic number.

13466787840 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 13466787840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27074807928).

13466787840 is an abundant number, since it is smaller than the sum of its proper divisors (40682828016).

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

13466787840 is an frugal number, since it uses more digits than its factorization.

13466787840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 13466787840 in words is "thirteen billion, four hundred sixty-six million, seven hundred eighty-seven thousand, eight hundred forty".