766766217 has 8 divisors (see below), whose sum is σ = 1168405696. Its totient is φ = 438152112.

The previous prime is 766766213. The next prime is 766766219. The reversal of 766766217 is 712667667.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 766766217 - 2² = 766766213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766766213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18256318 + ... + 18256359.

It is an arithmetic number, because the mean of its divisors is an integer number (146050712).

Almost surely, 2^766766217 is an apocalyptic number.

It is an amenable number.

766766217 is a deficient number, since it is larger than the sum of its proper divisors (401639479).

766766217 is a wasteful number, since it uses less digits than its factorization.

766766217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36512687.

The product of its digits is 889056, while the sum is 48.

The square root of 766766217 is about 27690.5438191452. The cubic root of 766766217 is about 915.2807392008.

The spelling of 766766217 in words is "seven hundred sixty-six million, seven hundred sixty-six thousand, two hundred seventeen".