68791669 has 8 divisors (see below), whose sum is σ = 69521760. Its totient is φ = 68065776.

The previous prime is 68791633. The next prime is 68791693. The reversal of 68791669 is 96619786.

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 68791669 - 2¹¹ = 68789621 is a prime.

It is a super-2 number, since 2×68791669² = 9464587447611122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68791169) 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, 39787 + ... + 41479.

It is an arithmetic number, because the mean of its divisors is an integer number (8690220).

Almost surely, 2^68791669 is an apocalyptic number.

It is an amenable number.

68791669 is a deficient number, since it is larger than the sum of its proper divisors (730091).

68791669 is a wasteful number, since it uses less digits than its factorization.

68791669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099.

The product of its digits is 979776, while the sum is 52.

The square root of 68791669 is about 8294.0743305085. The cubic root of 68791669 is about 409.7433829438.

The spelling of 68791669 in words is "sixty-eight million, seven hundred ninety-one thousand, six hundred sixty-nine".