768663533 has 4 divisors (see below), whose sum is σ = 838542048. Its totient is φ = 698785020.

The previous prime is 768663509. The next prime is 768663607. The reversal of 768663533 is 335366867.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 768663533 - 2⁸ = 768663277 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 (768663433) 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, 34939241 + ... + 34939262.

It is an arithmetic number, because the mean of its divisors is an integer number (209635512).

Almost surely, 2^768663533 is an apocalyptic number.

It is an amenable number.

768663533 is a deficient number, since it is larger than the sum of its proper divisors (69878515).

768663533 is a wasteful number, since it uses less digits than its factorization.

768663533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69878514.

The product of its digits is 1632960, while the sum is 47.

The square root of 768663533 is about 27724.7819288087. The cubic root of 768663533 is about 916.0350527353.

The spelling of 768663533 in words is "seven hundred sixty-eight million, six hundred sixty-three thousand, five hundred thirty-three".