68616571 has 4 divisors (see below), whose sum is σ = 68635000. Its totient is φ = 68598144.

The previous prime is 68616563. The next prime is 68616577. The reversal of 68616571 is 17561686.

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

It is a cyclic number.

It is not a de Polignac number, because 68616571 - 2³ = 68616563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68616577) 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, 1446 + ... + 11803.

It is an arithmetic number, because the mean of its divisors is an integer number (17158750).

Almost surely, 2^68616571 is an apocalyptic number.

68616571 is a deficient number, since it is larger than the sum of its proper divisors (18429).

68616571 is a wasteful number, since it uses less digits than its factorization.

68616571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18428.

The product of its digits is 60480, while the sum is 40.

The square root of 68616571 is about 8283.5119967318. The cubic root of 68616571 is about 409.3954425314.

The spelling of 68616571 in words is "sixty-eight million, six hundred sixteen thousand, five hundred seventy-one".