662661552366 has 128 divisors (see below), whose sum is σ = 1682985185280. Its totient is φ = 191309580000.

The previous prime is 662661552359. The next prime is 662661552391. The reversal of 662661552366 is 663255166266.

662661552366 is a `hidden beast` number, since 6 + 6 + 26 + 6 + 1 + 552 + 3 + 66 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3332541 + ... + 3525783.

It is an arithmetic number, because the mean of its divisors is an integer number (13148321760).

Almost surely, 2^662661552366 is an apocalyptic number.

662661552366 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 662661552366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (841492592640).

662661552366 is an abundant number, since it is smaller than the sum of its proper divisors (1020323632914).

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

662661552366 is a wasteful number, since it uses less digits than its factorization.

662661552366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193539 (or 193533 counting only the distinct ones).

The product of its digits is 13996800, while the sum is 54.

The spelling of 662661552366 in words is "six hundred sixty-two billion, six hundred sixty-one million, five hundred fifty-two thousand, three hundred sixty-six".