667650 has 24 divisors (see below), whose sum is σ = 1656144. Its totient is φ = 178000.

The previous prime is 667649. The next prime is 667657. The reversal of 667650 is 56766.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (667657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2076 + ... + 2375.

It is an arithmetic number, because the mean of its divisors is an integer number (69006).

2⁶⁶⁷⁶⁵⁰ is an apocalyptic number.

667650 is an abundant number, since it is smaller than the sum of its proper divisors (988494).

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

667650 is a wasteful number, since it uses less digits than its factorization.

667650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4466 (or 4461 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 667650 is about 817.0985252710. The cubic root of 667650 is about 87.4009764128.

The spelling of 667650 in words is "six hundred sixty-seven thousand, six hundred fifty".