68516771 has 4 divisors (see below), whose sum is σ = 68542344. Its totient is φ = 68491200.

The previous prime is 68516761. The next prime is 68516801. The reversal of 68516771 is 17761586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68516771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68516731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8225 + ... + 14306.

It is an arithmetic number, because the mean of its divisors is an integer number (17135586).

Almost surely, 2^68516771 is an apocalyptic number.

68516771 is a deficient number, since it is larger than the sum of its proper divisors (25573).

68516771 is a wasteful number, since it uses less digits than its factorization.

68516771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25572.

The product of its digits is 70560, while the sum is 41.

The square root of 68516771 is about 8277.4857897794. The cubic root of 68516771 is about 409.1968632417.

The spelling of 68516771 in words is "sixty-eight million, five hundred sixteen thousand, seven hundred seventy-one".