766520406 has 24 divisors (see below), whose sum is σ = 1664076960. Its totient is φ = 255001776.

The previous prime is 766520369. The next prime is 766520459. The reversal of 766520406 is 604025667.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32670 + ... + 50993.

It is an arithmetic number, because the mean of its divisors is an integer number (69336540).

Almost surely, 2^766520406 is an apocalyptic number.

766520406 is an abundant number, since it is smaller than the sum of its proper divisors (897556554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

766520406 is a wasteful number, since it uses less digits than its factorization.

766520406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84180 (or 84177 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 766520406 is about 27686.1049264789. The cubic root of 766520406 is about 915.1829214152.

The spelling of 766520406 in words is "seven hundred sixty-six million, five hundred twenty thousand, four hundred six".