768661613 has 8 divisors (see below), whose sum is σ = 814121280. Its totient is φ = 723229120.

The previous prime is 768661577. The next prime is 768661631. The reversal of 768661613 is 316166867.

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 768661613 - 2¹² = 768657517 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 (768661013) 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, 96098 + ... + 103788.

It is an arithmetic number, because the mean of its divisors is an integer number (101765160).

Almost surely, 2^768661613 is an apocalyptic number.

It is an amenable number.

768661613 is a deficient number, since it is larger than the sum of its proper divisors (45459667).

768661613 is a wasteful number, since it uses less digits than its factorization.

768661613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13587.

The product of its digits is 217728, while the sum is 44.

The square root of 768661613 is about 27724.7473027258. The cubic root of 768661613 is about 916.0342900310.

The spelling of 768661613 in words is "seven hundred sixty-eight million, six hundred sixty-one thousand, six hundred thirteen".