766545667 has 4 divisors (see below), whose sum is σ = 766932280. Its totient is φ = 766159056.

The previous prime is 766545653. The next prime is 766545677.

766545667 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 766545667 - 2¹⁹ = 766021379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766545617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190317 + ... + 194302.

It is an arithmetic number, because the mean of its divisors is an integer number (191733070).

Almost surely, 2^766545667 is an apocalyptic number.

766545667 is a deficient number, since it is larger than the sum of its proper divisors (386613).

766545667 is a wasteful number, since it uses less digits than its factorization.

766545667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386612.

The product of its digits is 6350400, while the sum is 52.

The square root of 766545667 is about 27686.5611262937. The cubic root of 766545667 is about 915.1929747165.

The spelling of 766545667 in words is "seven hundred sixty-six million, five hundred forty-five thousand, six hundred sixty-seven".