667710 has 32 divisors (see below), whose sum is σ = 1781280. Its totient is φ = 177984.

The previous prime is 667699. The next prime is 667727. The reversal of 667710 is 17766.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

667710 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 967 + ... + 1506.

It is an arithmetic number, because the mean of its divisors is an integer number (55665).

2⁶⁶⁷⁷¹⁰ is an apocalyptic number.

667710 is an abundant number, since it is smaller than the sum of its proper divisors (1113570).

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

667710 is a wasteful number, since it uses less digits than its factorization.

667710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489 (or 2483 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 667710 is about 817.1352397247. The cubic root of 667710 is about 87.4035945019.

It can be divided in two parts, 66 and 7710, that added together give a 5-th power (7776 = 6⁵).

The spelling of 667710 in words is "six hundred sixty-seven thousand, seven hundred ten".