769664421 has 12 divisors (see below), whose sum is σ = 1113639072. Its totient is φ = 512231976.

The previous prime is 769664411. The next prime is 769664447. The reversal of 769664421 is 124466967.

It is not a de Polignac number, because 769664421 - 2¹³ = 769656229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (769664411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67561 + ... + 78126.

It is an arithmetic number, because the mean of its divisors is an integer number (92803256).

Almost surely, 2^769664421 is an apocalyptic number.

It is an amenable number.

769664421 is a deficient number, since it is larger than the sum of its proper divisors (343974651).

769664421 is a wasteful number, since it uses less digits than its factorization.

769664421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146280 (or 146277 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 769664421 is about 27742.8264782087. The cubic root of 769664421 is about 916.4324744908.

The spelling of 769664421 in words is "seven hundred sixty-nine million, six hundred sixty-four thousand, four hundred twenty-one".