68812239766 has 12 divisors (see below), whose sum is σ = 106900348932. Its totient is φ = 33219701144.

The previous prime is 68812239761. The next prime is 68812239773. The reversal of 68812239766 is 66793221886.

It is a super-2 number, since 2×68812239766² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a self number, because there is not a number n which added to its sum of digits gives 68812239766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68812239761) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20453800 + ... + 20457163.

It is an arithmetic number, because the mean of its divisors is an integer number (8908362411).

Almost surely, 2^68812239766 is an apocalyptic number.

68812239766 is a deficient number, since it is larger than the sum of its proper divisors (38088109166).

68812239766 is a wasteful number, since it uses less digits than its factorization.

68812239766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40911023 (or 40910994 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 58.

The spelling of 68812239766 in words is "sixty-eight billion, eight hundred twelve million, two hundred thirty-nine thousand, seven hundred sixty-six".