667769023 has 4 divisors (see below), whose sum is σ = 668394760. Its totient is φ = 667143288.

The previous prime is 667769017. The next prime is 667769071. The reversal of 667769023 is 320967766.

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 667769023 - 2¹³ = 667760831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667769723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311265 + ... + 313402.

It is an arithmetic number, because the mean of its divisors is an integer number (167098690).

Almost surely, 2^667769023 is an apocalyptic number.

667769023 is a deficient number, since it is larger than the sum of its proper divisors (625737).

667769023 is a wasteful number, since it uses less digits than its factorization.

667769023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625736.

The product of its (nonzero) digits is 571536, while the sum is 46.

The square root of 667769023 is about 25841.2271960911. The cubic root of 667769023 is about 874.0616980674.

The spelling of 667769023 in words is "six hundred sixty-seven million, seven hundred sixty-nine thousand, twenty-three".