670181421 has 16 divisors (see below), whose sum is σ = 1099785344. Its totient is φ = 353502144.

The previous prime is 670181419. The next prime is 670181513. The reversal of 670181421 is 124181076.

670181421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 670181421 - 2¹ = 670181419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670181401) 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, 1227166 + ... + 1227711.

It is an arithmetic number, because the mean of its divisors is an integer number (68736584).

Almost surely, 2^670181421 is an apocalyptic number.

It is an amenable number.

670181421 is a deficient number, since it is larger than the sum of its proper divisors (429603923).

670181421 is a wasteful number, since it uses less digits than its factorization.

670181421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454900.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 670181421 is about 25887.8624262414. The cubic root of 670181421 is about 875.1129850291.

The spelling of 670181421 in words is "six hundred seventy million, one hundred eighty-one thousand, four hundred twenty-one".