20066860440 has 96 divisors (see below), whose sum is σ = 71146155600. Its totient is φ = 4864692480.

The previous prime is 20066860397. The next prime is 20066860453. The reversal of 20066860440 is 4406866002.

It is a happy number.

20066860440 is a `hidden beast` number, since 2 + 0 + 0 + 6 + 6 + 8 + 604 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20066860395 and 20066860404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2529735 + ... + 2537654.

Almost surely, 2^20066860440 is an apocalyptic number.

20066860440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20066860440 is an abundant number, since it is smaller than the sum of its proper divisors (51079295160).

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

20066860440 is a wasteful number, since it uses less digits than its factorization.

20066860440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5067417 (or 5067410 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The spelling of 20066860440 in words is "twenty billion, sixty-six million, eight hundred sixty thousand, four hundred forty".