68017657 has 8 divisors (see below), whose sum is σ = 69104000. Its totient is φ = 66937104.

The previous prime is 68017637. The next prime is 68017679. The reversal of 68017657 is 75671086.

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 68017657 - 2¹¹ = 68015609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68017637) 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, 26338 + ... + 28804.

It is an arithmetic number, because the mean of its divisors is an integer number (8638000).

Almost surely, 2^68017657 is an apocalyptic number.

It is an amenable number.

68017657 is a deficient number, since it is larger than the sum of its proper divisors (1086343).

68017657 is a wasteful number, since it uses less digits than its factorization.

68017657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 68017657 is about 8247.2817946279. The cubic root of 68017657 is about 408.2008354599.

The spelling of 68017657 in words is "sixty-eight million, seventeen thousand, six hundred fifty-seven".