766681057 has 8 divisors (see below), whose sum is σ = 825822720. Its totient is φ = 709690080.

The previous prime is 766681021. The next prime is 766681063. The reversal of 766681057 is 750186667.

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 766681057 - 2¹¹ = 766679009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 766680998 and 766681016.

It is not an unprimeable number, because it can be changed into a prime (766681007) 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, 536932 + ... + 538357.

It is an arithmetic number, because the mean of its divisors is an integer number (103227840).

Almost surely, 2^766681057 is an apocalyptic number.

It is an amenable number.

766681057 is a deficient number, since it is larger than the sum of its proper divisors (59141663).

766681057 is a wasteful number, since it uses less digits than its factorization.

766681057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075343.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 766681057 is about 27689.0060673907. The cubic root of 766681057 is about 915.2468530819.

The spelling of 766681057 in words is "seven hundred sixty-six million, six hundred eighty-one thousand, fifty-seven".