68278669 has 8 divisors (see below), whose sum is σ = 68796000. Its totient is φ = 67763856.

The previous prime is 68278643. The next prime is 68278687. The reversal of 68278669 is 96687286.

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 68278669 - 2⁹ = 68278157 is a prime.

It is a super-2 number, since 2×68278669² = 9323953280823122, 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 (68278619) 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, 136582 + ... + 137080.

It is an arithmetic number, because the mean of its divisors is an integer number (8599500).

Almost surely, 2^68278669 is an apocalyptic number.

It is an amenable number.

68278669 is a deficient number, since it is larger than the sum of its proper divisors (517331).

68278669 is a wasteful number, since it uses less digits than its factorization.

68278669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259.

The product of its digits is 1741824, while the sum is 52.

The square root of 68278669 is about 8263.0907655671. The cubic root of 68278669 is about 408.7223143658.

The spelling of 68278669 in words is "sixty-eight million, two hundred seventy-eight thousand, six hundred sixty-nine".