68669751 has 4 divisors (see below), whose sum is σ = 91559672. Its totient is φ = 45779832.

The previous prime is 68669747. The next prime is 68669813. The reversal of 68669751 is 15796686.

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

It is not a de Polignac number, because 68669751 - 2² = 68669747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68669751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68669351) 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, 11444956 + ... + 11444961.

It is an arithmetic number, because the mean of its divisors is an integer number (22889918).

Almost surely, 2^68669751 is an apocalyptic number.

68669751 is a deficient number, since it is larger than the sum of its proper divisors (22889921).

68669751 is a wasteful number, since it uses less digits than its factorization.

68669751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22889920.

The product of its digits is 544320, while the sum is 48.

The square root of 68669751 is about 8286.7213661375. The cubic root of 68669751 is about 409.5011799996.

The spelling of 68669751 in words is "sixty-eight million, six hundred sixty-nine thousand, seven hundred fifty-one".