68623731066 has 64 divisors (see below), whose sum is σ = 155242137600. Its totient is φ = 20032017600.

The previous prime is 68623731049. The next prime is 68623731101. The reversal of 68623731066 is 66013732686.

It is a happy 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, 799411 + ... + 881081.

It is an arithmetic number, because the mean of its divisors is an integer number (2425658400).

Almost surely, 2^68623731066 is an apocalyptic number.

68623731066 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 68623731066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77621068800).

68623731066 is an abundant number, since it is smaller than the sum of its proper divisors (86618406534).

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

68623731066 is a wasteful number, since it uses less digits than its factorization.

68623731066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82155.

The product of its (nonzero) digits is 1306368, while the sum is 48.

The spelling of 68623731066 in words is "sixty-eight billion, six hundred twenty-three million, seven hundred thirty-one thousand, sixty-six".