766399811 has 4 divisors (see below), whose sum is σ = 766633224. Its totient is φ = 766166400.

The previous prime is 766399727. The next prime is 766399841. The reversal of 766399811 is 118993667.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766399811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 766399811.

It is not an unprimeable number, because it can be changed into a prime (766399841) 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, 111710 + ... + 118371.

It is an arithmetic number, because the mean of its divisors is an integer number (191658306).

Almost surely, 2^766399811 is an apocalyptic number.

766399811 is a deficient number, since it is larger than the sum of its proper divisors (233413).

766399811 is a wasteful number, since it uses less digits than its factorization.

766399811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233412.

The product of its digits is 489888, while the sum is 50.

The square root of 766399811 is about 27683.9269432644. The cubic root of 766399811 is about 915.1349243139.

The spelling of 766399811 in words is "seven hundred sixty-six million, three hundred ninety-nine thousand, eight hundred eleven".