68650661376 has 320 divisors, whose sum is σ = 233361849600. Its totient is φ = 19707494400.

The previous prime is 68650661351. The next prime is 68650661399. The reversal of 68650661376 is 67316605686.

68650661376 is a `hidden beast` number, since 6 + 8 + 6 + 506 + 61 + 3 + 76 = 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 31 ways as a sum of consecutive naturals, for example, 2877336 + ... + 2901096.

It is an arithmetic number, because the mean of its divisors is an integer number (729255780).

Almost surely, 2^68650661376 is an apocalyptic number.

68650661376 is a gapful number since it is divisible by the number (66) 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 68650661376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116680924800).

68650661376 is an abundant number, since it is smaller than the sum of its proper divisors (164711188224).

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

68650661376 is a wasteful number, since it uses less digits than its factorization.

68650661376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23818 (or 23796 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 68650661376 in words is "sixty-eight billion, six hundred fifty million, six hundred sixty-one thousand, three hundred seventy-six".