667550 has 36 divisors (see below), whose sum is σ = 1361520. Its totient is φ = 243360.

The previous prime is 667549. The next prime is 667553. The reversal of 667550 is 55766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667553) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8411 + ... + 8489.

It is an arithmetic number, because the mean of its divisors is an integer number (37820).

2⁶⁶⁷⁵⁵⁰ is an apocalyptic number.

667550 is an abundant number, since it is smaller than the sum of its proper divisors (693970).

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

667550 is a wasteful number, since it uses less digits than its factorization.

667550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 667550 is about 817.0373308485. The cubic root of 667550 is about 87.3966125825.

The spelling of 667550 in words is "six hundred sixty-seven thousand, five hundred fifty".