1850145666 has 32 divisors (see below), whose sum is σ = 3925853568. Its totient is φ = 579267840.

The previous prime is 1850145641. The next prime is 1850145697. The reversal of 1850145666 is 6665410581.

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 15 ways as a sum of consecutive naturals, for example, 33276 + ... + 69336.

It is an arithmetic number, because the mean of its divisors is an integer number (122682924).

Almost surely, 2^1850145666 is an apocalyptic number.

1850145666 is an abundant number, since it is smaller than the sum of its proper divisors (2075707902).

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

1850145666 is a wasteful number, since it uses less digits than its factorization.

1850145666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36586.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 1850145666 is about 43013.3196347364. The cubic root of 1850145666 is about 1227.6332451179.

The spelling of 1850145666 in words is "one billion, eight hundred fifty million, one hundred forty-five thousand, six hundred sixty-six".