1667420125 has 32 divisors (see below), whose sum is σ = 2381693184. Its totient is φ = 1141704000.

The previous prime is 1667420119. The next prime is 1667420141. The reversal of 1667420125 is 5210247661.

It is not a de Polignac number, because 1667420125 - 2¹⁹ = 1666895837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1060590 + ... + 1062160.

It is an arithmetic number, because the mean of its divisors is an integer number (74427912).

Almost surely, 2^1667420125 is an apocalyptic number.

It is an amenable number.

1667420125 is a deficient number, since it is larger than the sum of its proper divisors (714273059).

1667420125 is a wasteful number, since it uses less digits than its factorization.

1667420125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2806 (or 2796 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 1667420125 is about 40834.0559459870. The cubic root of 1667420125 is about 1185.8097393069.

Adding to 1667420125 its reverse (5210247661), we get a palindrome (6877667786).

The spelling of 1667420125 in words is "one billion, six hundred sixty-seven million, four hundred twenty thousand, one hundred twenty-five".