1866802345 has 32 divisors (see below), whose sum is σ = 2398193280. Its totient is φ = 1390970880.

The previous prime is 1866802339. The next prime is 1866802349. The reversal of 1866802345 is 5432086681.

It is not a de Polignac number, because 1866802345 - 2²⁷ = 1732584617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1866802349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1593610 + ... + 1594780.

It is an arithmetic number, because the mean of its divisors is an integer number (74943540).

Almost surely, 2^1866802345 is an apocalyptic number.

It is an amenable number.

1866802345 is a deficient number, since it is larger than the sum of its proper divisors (531390935).

1866802345 is a wasteful number, since it uses less digits than its factorization.

1866802345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 1866802345 is about 43206.5081324562. The cubic root of 1866802345 is about 1231.3063312800.

The spelling of 1866802345 in words is "one billion, eight hundred sixty-six million, eight hundred two thousand, three hundred forty-five".