1866912425 has 12 divisors (see below), whose sum is σ = 2645681856. Its totient is φ = 1280168400.

The previous prime is 1866912401. The next prime is 1866912449. The reversal of 1866912425 is 5242196681.

It is an interprime number because it is at equal distance from previous prime (1866912401) and next prime (1866912449).

It is not a de Polignac number, because 1866912425 - 2⁶ = 1866912361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5333861 + ... + 5334210.

It is an arithmetic number, because the mean of its divisors is an integer number (220473488).

Almost surely, 2^1866912425 is an apocalyptic number.

It is an amenable number.

1866912425 is a deficient number, since it is larger than the sum of its proper divisors (778769431).

1866912425 is a wasteful number, since it uses less digits than its factorization.

1866912425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10668088 (or 10668083 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 1866912425 is about 43207.7819958396. The cubic root of 1866912425 is about 1231.3305330096.

The spelling of 1866912425 in words is "one billion, eight hundred sixty-six million, nine hundred twelve thousand, four hundred twenty-five".