766406399 has 8 divisors (see below), whose sum is σ = 856472400. Its totient is φ = 679739200.

The previous prime is 766406387. The next prime is 766406429. The reversal of 766406399 is 993604667.

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 766406399 - 2⁸ = 766406143 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 (766406339) 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, 849224 + ... + 850125.

It is an arithmetic number, because the mean of its divisors is an integer number (107059050).

Almost surely, 2^766406399 is an apocalyptic number.

766406399 is a deficient number, since it is larger than the sum of its proper divisors (90066001).

766406399 is a wasteful number, since it uses less digits than its factorization.

766406399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699401.

The product of its (nonzero) digits is 1469664, while the sum is 50.

The square root of 766406399 is about 27684.0459290184. The cubic root of 766406399 is about 915.1375464838.

The spelling of 766406399 in words is "seven hundred sixty-six million, four hundred six thousand, three hundred ninety-nine".