766121066 has 4 divisors (see below), whose sum is σ = 1149181602. Its totient is φ = 383060532.

The previous prime is 766121063. The next prime is 766121071. The reversal of 766121066 is 660121667.

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., 499746025 + 266375041 = 22355^2 + 16321^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (766121063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191530265 + ... + 191530268.

Almost surely, 2^766121066 is an apocalyptic number.

766121066 is a deficient number, since it is larger than the sum of its proper divisors (383060536).

766121066 is a wasteful number, since it uses less digits than its factorization.

766121066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383060535.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 766121066 is about 27678.8920659769. The cubic root of 766121066 is about 915.0239638582.

The spelling of 766121066 in words is "seven hundred sixty-six million, one hundred twenty-one thousand, sixty-six".