667860 has 24 divisors (see below), whose sum is σ = 1870176. Its totient is φ = 178080.

The previous prime is 667859. The next prime is 667861. The reversal of 667860 is 68766.

It is an interprime number because it is at equal distance from previous prime (667859) and next prime (667861).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667861) 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, 5506 + ... + 5625.

It is an arithmetic number, because the mean of its divisors is an integer number (77924).

2⁶⁶⁷⁸⁶⁰ is an apocalyptic number.

667860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667860 is an abundant number, since it is smaller than the sum of its proper divisors (1202316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667860 is a wasteful number, since it uses less digits than its factorization.

667860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11143 (or 11141 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 667860 is about 817.2270186429. The cubic root of 667860 is about 87.4101390385.

The spelling of 667860 in words is "six hundred sixty-seven thousand, eight hundred sixty".