775679669 has 4 divisors (see below), whose sum is σ = 809404896. Its totient is φ = 741954444.

The previous prime is 775679651. The next prime is 775679699. The reversal of 775679669 is 966976577.

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 775679669 - 2⁸ = 775679413 is a prime.

It is a super-2 number, since 2×775679669² = 1203357897799899122, 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 (775679629) 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, 16862579 + ... + 16862624.

It is an arithmetic number, because the mean of its divisors is an integer number (202351224).

Almost surely, 2^775679669 is an apocalyptic number.

It is an amenable number.

775679669 is a deficient number, since it is larger than the sum of its proper divisors (33725227).

775679669 is a wasteful number, since it uses less digits than its factorization.

775679669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33725226.

The product of its digits is 30005640, while the sum is 62.

The square root of 775679669 is about 27851.0263545170. The cubic root of 775679669 is about 918.8137155806.

The spelling of 775679669 in words is "seven hundred seventy-five million, six hundred seventy-nine thousand, six hundred sixty-nine".