68681951 has 8 divisors (see below), whose sum is σ = 74042304. Its totient is φ = 63332640.

The previous prime is 68681927. The next prime is 68681983. The reversal of 68681951 is 15918686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68681951 - 2¹⁸ = 68419807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68681911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13946 + ... + 18216.

It is an arithmetic number, because the mean of its divisors is an integer number (9255288).

Almost surely, 2^68681951 is an apocalyptic number.

68681951 is a deficient number, since it is larger than the sum of its proper divisors (5360353).

68681951 is a wasteful number, since it uses less digits than its factorization.

68681951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521.

The product of its digits is 103680, while the sum is 44.

The square root of 68681951 is about 8287.4574508712. The cubic root of 68681951 is about 409.5254294859.

The spelling of 68681951 in words is "sixty-eight million, six hundred eighty-one thousand, nine hundred fifty-one".