667849 has 16 divisors (see below), whose sum is σ = 846720. Its totient is φ = 512640.

The previous prime is 667837. The next prime is 667859. The reversal of 667849 is 948766.

It is a cyclic number.

It is not a de Polignac number, because 667849 - 2⁵ = 667817 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (667819) 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, 3642 + ... + 3820.

It is an arithmetic number, because the mean of its divisors is an integer number (52920).

2⁶⁶⁷⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

667849 is a deficient number, since it is larger than the sum of its proper divisors (178871).

667849 is a wasteful number, since it uses less digits than its factorization.

667849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240.

The product of its digits is 72576, while the sum is 40.

The square root of 667849 is about 817.2202885391. The cubic root of 667849 is about 87.4096591391.

The spelling of 667849 in words is "six hundred sixty-seven thousand, eight hundred forty-nine".