1667125215 has 48 divisors (see below), whose sum is σ = 3446097408. Its totient is φ = 728975808.

The previous prime is 1667125157. The next prime is 1667125219. The reversal of 1667125215 is 5125217661.

1667125215 is a `hidden beast` number, since 1 + 66 + 71 + 2 + 521 + 5 = 666.

It is not a de Polignac number, because 1667125215 - 2¹¹ = 1667123167 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1667125215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667125219) 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, 107809 + ... + 122298.

It is an arithmetic number, because the mean of its divisors is an integer number (71793696).

Almost surely, 2^1667125215 is an apocalyptic number.

1667125215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1667125215 is an abundant number, since it is smaller than the sum of its proper divisors (1778972193).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1667125215 is a wasteful number, since it uses less digits than its factorization.

1667125215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230148 (or 230145 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 1667125215 is about 40830.4447073504. Note that the first 3 decimals coincide. The cubic root of 1667125215 is about 1185.7398253594.

The spelling of 1667125215 in words is "one billion, six hundred sixty-seven million, one hundred twenty-five thousand, two hundred fifteen".