667020 has 24 divisors (see below), whose sum is σ = 1867824. Its totient is φ = 177856.

The previous prime is 667019. The next prime is 667021. The reversal of 667020 is 20766.

It is an interprime number because it is at equal distance from previous prime (667019) and next prime (667021).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (667021) 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, 5499 + ... + 5618.

It is an arithmetic number, because the mean of its divisors is an integer number (77826).

2⁶⁶⁷⁰²⁰ is an apocalyptic number.

667020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667020 is an abundant number, since it is smaller than the sum of its proper divisors (1200804).

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

667020 is a wasteful number, since it uses less digits than its factorization.

667020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11129 (or 11127 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 667020 is about 816.7129238600. The cubic root of 667020 is about 87.3734770028.

Adding to 667020 its reverse (20766), we get a palindrome (687786).

The spelling of 667020 in words is "six hundred sixty-seven thousand, twenty".