68328661 has 8 divisors (see below), whose sum is σ = 72572544. Its totient is φ = 64109760.

The previous prime is 68328641. The next prime is 68328691. The reversal of 68328661 is 16682386.

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 68328661 - 2²³ = 59940053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68328641) 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, 445 + ... + 11698.

It is an arithmetic number, because the mean of its divisors is an integer number (9071568).

Almost surely, 2^68328661 is an apocalyptic number.

It is an amenable number.

68328661 is a deficient number, since it is larger than the sum of its proper divisors (4243883).

68328661 is a wasteful number, since it uses less digits than its factorization.

68328661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12491.

The product of its digits is 82944, while the sum is 40.

The square root of 68328661 is about 8266.1152302639. The cubic root of 68328661 is about 408.8220422479.

The spelling of 68328661 in words is "sixty-eight million, three hundred twenty-eight thousand, six hundred sixty-one".