667255669 has 8 divisors (see below), whose sum is σ = 687277728. Its totient is φ = 647338320.

The previous prime is 667255649. The next prime is 667255679. The reversal of 667255669 is 966552766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 667255669 - 2⁷ = 667255541 is a prime.

It is a super-2 number, since 2×667255669² = 890460255625275122, 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 (667255649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13147 + ... + 38824.

It is an arithmetic number, because the mean of its divisors is an integer number (85909716).

Almost surely, 2^667255669 is an apocalyptic number.

It is an amenable number.

667255669 is a deficient number, since it is larger than the sum of its proper divisors (20022059).

667255669 is a wasteful number, since it uses less digits than its factorization.

667255669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52355.

The product of its digits is 4082400, while the sum is 52.

The square root of 667255669 is about 25831.2924376617. The cubic root of 667255669 is about 873.8376594731.

The spelling of 667255669 in words is "six hundred sixty-seven million, two hundred fifty-five thousand, six hundred sixty-nine".