667221885 has 48 divisors (see below), whose sum is σ = 1265060160. Its totient is φ = 322629120.

The previous prime is 667221869. The next prime is 667221887. The reversal of 667221885 is 588122766.

It is not a de Polignac number, because 667221885 - 2⁴ = 667221869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 667221885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667221887) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 205797 + ... + 209013.

It is an arithmetic number, because the mean of its divisors is an integer number (26355420).

Almost surely, 2^667221885 is an apocalyptic number.

It is an amenable number.

667221885 is a deficient number, since it is larger than the sum of its proper divisors (597838275).

667221885 is a wasteful number, since it uses less digits than its factorization.

667221885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658 (or 3655 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 667221885 is about 25830.6384938507. The cubic root of 667221885 is about 873.8229113882.

The spelling of 667221885 in words is "six hundred sixty-seven million, two hundred twenty-one thousand, eight hundred eighty-five".