663926247936 has 360 divisors, whose sum is σ = 2241563472720. Its totient is φ = 188621991936.

The previous prime is 663926247923. The next prime is 663926247947. The reversal of 663926247936 is 639742629366.

It is a happy number.

663926247936 is a `hidden beast` number, since 66 + 392 + 62 + 47 + 93 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 40408555 + ... + 40424981.

It is an arithmetic number, because the mean of its divisors is an integer number (6226565202).

Almost surely, 2^663926247936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663926247936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1120781736360).

663926247936 is an abundant number, since it is smaller than the sum of its proper divisors (1577637224784).

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

663926247936 is a wasteful number, since it uses less digits than its factorization.

663926247936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16644 (or 16618 counting only the distinct ones).

The product of its digits is 105815808, while the sum is 63.

The spelling of 663926247936 in words is "six hundred sixty-three billion, nine hundred twenty-six million, two hundred forty-seven thousand, nine hundred thirty-six".