766772066 has 4 divisors (see below), whose sum is σ = 1150158102. Its totient is φ = 383386032.

The previous prime is 766772059. The next prime is 766772081. The reversal of 766772066 is 660277667.

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

It can be written as a sum of positive squares in only one way, i.e., 539214841 + 227557225 = 23221^2 + 15085^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 766772066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191693015 + ... + 191693018.

Almost surely, 2^766772066 is an apocalyptic number.

766772066 is a deficient number, since it is larger than the sum of its proper divisors (383386036).

766772066 is a wasteful number, since it uses less digits than its factorization.

766772066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383386035.

The product of its (nonzero) digits is 889056, while the sum is 47.

The square root of 766772066 is about 27690.6494326153. The cubic root of 766772066 is about 915.2830664914.

The spelling of 766772066 in words is "seven hundred sixty-six million, seven hundred seventy-two thousand, sixty-six".