667695 has 16 divisors (see below), whose sum is σ = 1221120. Its totient is φ = 305184.

The previous prime is 667691. The next prime is 667697. The reversal of 667695 is 596766.

It is a happy number.

It is not a de Polignac number, because 667695 - 2² = 667691 is a prime.

It is a super-2 number, since 2×667695² = 891633226050, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6⁴ + 6⁵ + 6⁶ + 7⁴ + 9⁶ + 5⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3075 + ... + 3284.

It is an arithmetic number, because the mean of its divisors is an integer number (76320).

2⁶⁶⁷⁶⁹⁵ is an apocalyptic number.

667695 is a deficient number, since it is larger than the sum of its proper divisors (553425).

667695 is a wasteful number, since it uses less digits than its factorization.

667695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6374.

The product of its digits is 68040, while the sum is 39.

The square root of 667695 is about 817.1260612659. The cubic root of 667695 is about 87.4029399943.

The spelling of 667695 in words is "six hundred sixty-seven thousand, six hundred ninety-five".