1860066121 has 4 divisors (see below), whose sum is σ = 1863335700. Its totient is φ = 1856796544.

The previous prime is 1860066113. The next prime is 1860066133. The reversal of 1860066121 is 1216600681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1216600681 = 22189 ⋅54829.

It can be written as a sum of positive squares in 2 ways, for example, as 558660496 + 1301405625 = 23636^2 + 36075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1860066121 - 2³ = 1860066113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1860066191) 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 3 ways as a sum of consecutive naturals, for example, 1633936 + ... + 1635073.

It is an arithmetic number, because the mean of its divisors is an integer number (465833925).

Almost surely, 2^1860066121 is an apocalyptic number.

It is an amenable number.

1860066121 is a deficient number, since it is larger than the sum of its proper divisors (3269579).

1860066121 is an equidigital number, since it uses as much as digits as its factorization.

1860066121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3269578.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1860066121 is about 43128.4838708712. The cubic root of 1860066121 is about 1229.8235190866.

The spelling of 1860066121 in words is "one billion, eight hundred sixty million, sixty-six thousand, one hundred twenty-one".