766381563 has 12 divisors (see below), whose sum is σ = 1111409208. Its totient is φ = 508884000.

The previous prime is 766381547. The next prime is 766381589. The reversal of 766381563 is 365183667.

766381563 is a `hidden beast` number, since 7 + 6 + 6 + 3 + 81 + 563 = 666.

It is not a de Polignac number, because 766381563 - 2⁴ = 766381547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (766386563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167370 + ... + 171887.

It is an arithmetic number, because the mean of its divisors is an integer number (92617434).

Almost surely, 2^766381563 is an apocalyptic number.

766381563 is a deficient number, since it is larger than the sum of its proper divisors (345027645).

766381563 is a wasteful number, since it uses less digits than its factorization.

766381563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339514 (or 339511 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 766381563 is about 27683.5973637820. The cubic root of 766381563 is about 915.1276611272.

The spelling of 766381563 in words is "seven hundred sixty-six million, three hundred eighty-one thousand, five hundred sixty-three".