2190851866 has 8 divisors (see below), whose sum is σ = 3755746080. Its totient is φ = 938936508.

The previous prime is 2190851833. The next prime is 2190851869. The reversal of 2190851866 is 6681580912.

2190851866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2190851869) 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, 78244696 + ... + 78244723.

It is an arithmetic number, because the mean of its divisors is an integer number (469468260).

Almost surely, 2^2190851866 is an apocalyptic number.

2190851866 is a deficient number, since it is larger than the sum of its proper divisors (1564894214).

2190851866 is a wasteful number, since it uses less digits than its factorization.

2190851866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156489428.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 2190851866 is about 46806.5365734317. The cubic root of 2190851866 is about 1298.7862173653.

The spelling of 2190851866 in words is "two billion, one hundred ninety million, eight hundred fifty-one thousand, eight hundred sixty-six".