766690305 has 32 divisors (see below), whose sum is σ = 1247063040. Its totient is φ = 402144960.

The previous prime is 766690241. The next prime is 766690307. The reversal of 766690305 is 503096667.

It is not a de Polignac number, because 766690305 - 2⁶ = 766690241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (766690307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 658654 + ... + 659816.

It is an arithmetic number, because the mean of its divisors is an integer number (38970720).

Almost surely, 2^766690305 is an apocalyptic number.

It is an amenable number.

766690305 is a deficient number, since it is larger than the sum of its proper divisors (480372735).

766690305 is a wasteful number, since it uses less digits than its factorization.

766690305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861.

The product of its (nonzero) digits is 204120, while the sum is 42.

The square root of 766690305 is about 27689.1730645753. The cubic root of 766690305 is about 915.2505330862.

The spelling of 766690305 in words is "seven hundred sixty-six million, six hundred ninety thousand, three hundred five".