1866354481 has 32 divisors (see below), whose sum is σ = 2068416000. Its totient is φ = 1678533120.

The previous prime is 1866354467. The next prime is 1866354487. The reversal of 1866354481 is 1844536681.

It is not a de Polignac number, because 1866354481 - 2⁵ = 1866354449 is a prime.

It is a super-2 number, since 2×1866354481² = 6966558097497558722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1866354487) 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, 5198580 + ... + 5198938.

It is an arithmetic number, because the mean of its divisors is an integer number (64638000).

Almost surely, 2^1866354481 is an apocalyptic number.

It is an amenable number.

1866354481 is a deficient number, since it is larger than the sum of its proper divisors (202061519).

1866354481 is a wasteful number, since it uses less digits than its factorization.

1866354481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609.

The product of its digits is 552960, while the sum is 46.

The square root of 1866354481 is about 43201.3249912546. The cubic root of 1866354481 is about 1231.2078559583.

The spelling of 1866354481 in words is "one billion, eight hundred sixty-six million, three hundred fifty-four thousand, four hundred eighty-one".