670552221 has 16 divisors (see below), whose sum is σ = 919240064. Its totient is φ = 434476224.

The previous prime is 670552219. The next prime is 670552247. The reversal of 670552221 is 122255076.

It is not a de Polignac number, because 670552221 - 2¹ = 670552219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670552271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118560 + ... + 124086.

It is an arithmetic number, because the mean of its divisors is an integer number (57452504).

Almost surely, 2^670552221 is an apocalyptic number.

It is an amenable number.

670552221 is a deficient number, since it is larger than the sum of its proper divisors (248687843).

670552221 is a wasteful number, since it uses less digits than its factorization.

670552221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6660.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 670552221 is about 25895.0230932510. The cubic root of 670552221 is about 875.2743503241.

The spelling of 670552221 in words is "six hundred seventy million, five hundred fifty-two thousand, two hundred twenty-one".