667769241 has 4 divisors (see below), whose sum is σ = 890358992. Its totient is φ = 445179492.

The previous prime is 667769239. The next prime is 667769261. The reversal of 667769241 is 142967766.

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 not a de Polignac number, because 667769241 - 2¹ = 667769239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667769261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111294871 + ... + 111294876.

It is an arithmetic number, because the mean of its divisors is an integer number (222589748).

Almost surely, 2^667769241 is an apocalyptic number.

It is an amenable number.

667769241 is a deficient number, since it is larger than the sum of its proper divisors (222589751).

667769241 is a wasteful number, since it uses less digits than its factorization.

667769241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222589750.

The product of its digits is 762048, while the sum is 48.

The square root of 667769241 is about 25841.2314141567. The cubic root of 667769241 is about 874.0617931828.

The spelling of 667769241 in words is "six hundred sixty-seven million, seven hundred sixty-nine thousand, two hundred forty-one".