68316566 has 4 divisors (see below), whose sum is σ = 102474852. Its totient is φ = 34158282.

The previous prime is 68316491. The next prime is 68316581. The reversal of 68316566 is 66561386.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66561386 = 2 ⋅33280693.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17079140 + ... + 17079143.

It is an arithmetic number, because the mean of its divisors is an integer number (25618713).

Almost surely, 2^68316566 is an apocalyptic number.

68316566 is a deficient number, since it is larger than the sum of its proper divisors (34158286).

68316566 is a wasteful number, since it uses less digits than its factorization.

68316566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34158285.

The product of its digits is 155520, while the sum is 41.

The square root of 68316566 is about 8265.3835966639. The cubic root of 68316566 is about 408.7979186746.

The spelling of 68316566 in words is "sixty-eight million, three hundred sixteen thousand, five hundred sixty-six".