68761751 has 4 divisors (see below), whose sum is σ = 70979904. Its totient is φ = 66543600.

The previous prime is 68761747. The next prime is 68761757. The reversal of 68761751 is 15716786.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68761751 - 2² = 68761747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68761699 and 68761708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68761757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1109030 + ... + 1109091.

It is an arithmetic number, because the mean of its divisors is an integer number (17744976).

Almost surely, 2^68761751 is an apocalyptic number.

68761751 is a deficient number, since it is larger than the sum of its proper divisors (2218153).

68761751 is a wasteful number, since it uses less digits than its factorization.

68761751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218152.

The product of its digits is 70560, while the sum is 41.

The square root of 68761751 is about 8292.2705575735. The cubic root of 68761751 is about 409.6839741991.

The spelling of 68761751 in words is "sixty-eight million, seven hundred sixty-one thousand, seven hundred fifty-one".