1866916345 has 32 divisors (see below), whose sum is σ = 2760871680. Its totient is φ = 1183196160.

The previous prime is 1866916343. The next prime is 1866916393. The reversal of 1866916345 is 5436196681.

It is not a de Polignac number, because 1866916345 - 2¹ = 1866916343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1866916343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6972 + ... + 61501.

It is an arithmetic number, because the mean of its divisors is an integer number (86277240).

Almost surely, 2^1866916345 is an apocalyptic number.

It is an amenable number.

1866916345 is a deficient number, since it is larger than the sum of its proper divisors (893955335).

1866916345 is a wasteful number, since it uses less digits than its factorization.

1866916345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68545.

The product of its digits is 933120, while the sum is 49.

The square root of 1866916345 is about 43207.8273580147. The cubic root of 1866916345 is about 1231.3313948269.

The spelling of 1866916345 in words is "one billion, eight hundred sixty-six million, nine hundred sixteen thousand, three hundred forty-five".