766573812 has 18 divisors (see below), whose sum is σ = 1937728338. Its totient is φ = 255524592.

The previous prime is 766573811. The next prime is 766573817. The reversal of 766573812 is 218375667.

766573812 is a `hidden beast` number, since 7 + 66 + 573 + 8 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 735168996 + 31404816 = 27114^2 + 5604^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×766573812² = 1175270818488422688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766573811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10646823 + ... + 10646894.

Almost surely, 2^766573812 is an apocalyptic number.

It is an amenable number.

766573812 is an abundant number, since it is smaller than the sum of its proper divisors (1171154526).

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

766573812 is a wasteful number, since it uses less digits than its factorization.

766573812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21293727 (or 21293722 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 766573812 is about 27687.0694007148. The cubic root of 766573812 is about 915.2041755239.

The spelling of 766573812 in words is "seven hundred sixty-six million, five hundred seventy-three thousand, eight hundred twelve".