667115220 has 48 divisors (see below), whose sum is σ = 1872158400. Its totient is φ = 177494016.

The previous prime is 667115209. The next prime is 667115231. The reversal of 667115220 is 22511766.

It is an interprime number because it is at equal distance from previous prime (667115209) and next prime (667115231).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14559 + ... + 39321.

It is an arithmetic number, because the mean of its divisors is an integer number (39003300).

Almost surely, 2^667115220 is an apocalyptic number.

667115220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667115220 is an abundant number, since it is smaller than the sum of its proper divisors (1205043180).

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

667115220 is a wasteful number, since it uses less digits than its factorization.

667115220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25224 (or 25222 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 667115220 is about 25828.5737120732. The cubic root of 667115220 is about 873.7763445263.

Adding to 667115220 its reverse (22511766), we get a palindrome (689626986).

The spelling of 667115220 in words is "six hundred sixty-seven million, one hundred fifteen thousand, two hundred twenty".