667975267 has 6 divisors (see below), whose sum is σ = 704982588. Its totient is φ = 632818332.

The previous prime is 667975261. The next prime is 667975277. The reversal of 667975267 is 762579766.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-667975267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667975261) 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 5 ways as a sum of consecutive naturals, for example, 924813 + ... + 925534.

It is an arithmetic number, because the mean of its divisors is an integer number (117497098).

Almost surely, 2^667975267 is an apocalyptic number.

667975267 is a deficient number, since it is larger than the sum of its proper divisors (37007321).

667975267 is a wasteful number, since it uses less digits than its factorization.

667975267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850385 (or 1850366 counting only the distinct ones).

The product of its digits is 6667920, while the sum is 55.

The square root of 667975267 is about 25845.2174879609. The cubic root of 667975267 is about 874.1516749999.

The spelling of 667975267 in words is "six hundred sixty-seven million, nine hundred seventy-five thousand, two hundred sixty-seven".