68686577 has 8 divisors (see below), whose sum is σ = 72680160. Its totient is φ = 64730880.

The previous prime is 68686559. The next prime is 68686627. The reversal of 68686577 is 77568686.

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 68686577 - 2¹⁴ = 68670193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68686517) 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, 5699 + ... + 13032.

It is an arithmetic number, because the mean of its divisors is an integer number (9085020).

Almost surely, 2^68686577 is an apocalyptic number.

It is an amenable number.

68686577 is a deficient number, since it is larger than the sum of its proper divisors (3993583).

68686577 is a wasteful number, since it uses less digits than its factorization.

68686577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18943.

The product of its digits is 3386880, while the sum is 53.

The square root of 68686577 is about 8287.7365426273. The cubic root of 68686577 is about 409.5346236632.

The spelling of 68686577 in words is "sixty-eight million, six hundred eighty-six thousand, five hundred seventy-seven".