670567217221 has 16 divisors (see below), whose sum is σ = 766797248448. Its totient is φ = 580906972800.

The previous prime is 670567217183. The next prime is 670567217233. The reversal of 670567217221 is 122712765076.

It is not a de Polignac number, because 670567217221 - 2¹⁵ = 670567184453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670567217921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17269506 + ... + 17308291.

It is an arithmetic number, because the mean of its divisors is an integer number (47924828028).

Almost surely, 2^670567217221 is an apocalyptic number.

It is an amenable number.

670567217221 is a deficient number, since it is larger than the sum of its proper divisors (96230031227).

670567217221 is a wasteful number, since it uses less digits than its factorization.

670567217221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34577892.

The product of its (nonzero) digits is 493920, while the sum is 46.

It can be divided in two parts, 670567 and 217221, that added together give a palindrome (887788).

The spelling of 670567217221 in words is "six hundred seventy billion, five hundred sixty-seven million, two hundred seventeen thousand, two hundred twenty-one".