667797769 has 4 divisors (see below), whose sum is σ = 702945040. Its totient is φ = 632650500.

The previous prime is 667797743. The next prime is 667797803. The reversal of 667797769 is 967797766.

667797769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 667797769 - 2⁵ = 667797737 is a prime.

It is a super-2 number, since 2×667797769² = 891907720562754722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 667797769.

It is not an unprimeable number, because it can be changed into a prime (667797469) 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, 17573607 + ... + 17573644.

It is an arithmetic number, because the mean of its divisors is an integer number (175736260).

Almost surely, 2^667797769 is an apocalyptic number.

It is an amenable number.

667797769 is a deficient number, since it is larger than the sum of its proper divisors (35147271).

667797769 is a wasteful number, since it uses less digits than its factorization.

667797769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35147270.

The product of its digits is 42007896, while the sum is 64.

The square root of 667797769 is about 25841.7833943403. The cubic root of 667797769 is about 874.0742400373.

The spelling of 667797769 in words is "six hundred sixty-seven million, seven hundred ninety-seven thousand, seven hundred sixty-nine".