766346989 has 4 divisors (see below), whose sum is σ = 784169056. Its totient is φ = 748524924.

The previous prime is 766346963. The next prime is 766347017. The reversal of 766346989 is 989643667.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 766346989 - 2²⁷ = 632129261 is a prime.

It is a super-2 number, since 2×766346989² = 1174575415098732242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766346389) 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, 8910969 + ... + 8911054.

It is an arithmetic number, because the mean of its divisors is an integer number (196042264).

Almost surely, 2^766346989 is an apocalyptic number.

It is an amenable number.

766346989 is a deficient number, since it is larger than the sum of its proper divisors (17822067).

766346989 is a wasteful number, since it uses less digits than its factorization.

766346989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17822066.

The product of its digits is 11757312, while the sum is 58.

The square root of 766346989 is about 27682.9729075473. The cubic root of 766346989 is about 915.1138994446.

The spelling of 766346989 in words is "seven hundred sixty-six million, three hundred forty-six thousand, nine hundred eighty-nine".