1866850037 has 4 divisors (see below), whose sum is σ = 2010453900. Its totient is φ = 1723246176.

The previous prime is 1866850033. The next prime is 1866850049. The reversal of 1866850037 is 7300586681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7300586681 = 421 ⋅17341061.

It can be written as a sum of positive squares in 2 ways, for example, as 75359761 + 1791490276 = 8681^2 + 42326^2 .

It is a cyclic number.

It is not a de Polignac number, because 1866850037 - 2² = 1866850033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1866850037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866850033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71801912 + ... + 71801937.

It is an arithmetic number, because the mean of its divisors is an integer number (502613475).

Almost surely, 2^1866850037 is an apocalyptic number.

It is an amenable number.

1866850037 is a deficient number, since it is larger than the sum of its proper divisors (143603863).

1866850037 is a wasteful number, since it uses less digits than its factorization.

1866850037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143603862.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 1866850037 is about 43207.0600365264. The cubic root of 1866850037 is about 1231.3168167610.

The spelling of 1866850037 in words is "one billion, eight hundred sixty-six million, eight hundred fifty thousand, thirty-seven".