1866081687052 has 12 divisors (see below), whose sum is σ = 3562519584456. Its totient is φ = 848218948640.

The previous prime is 1866081687047. The next prime is 1866081687053. The reversal of 1866081687052 is 2507861806681.

It is not an unprimeable number, because it can be changed into a prime (1866081687053) 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, 21205473673 + ... + 21205473760.

It is an arithmetic number, because the mean of its divisors is an integer number (296876632038).

Almost surely, 2^{1866081687052} is an apocalyptic number.

It is an amenable number.

1866081687052 is a deficient number, since it is larger than the sum of its proper divisors (1696437897404).

1866081687052 is a wasteful number, since it uses less digits than its factorization.

1866081687052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42410947448 (or 42410947446 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 58.

The spelling of 1866081687052 in words is "one trillion, eight hundred sixty-six billion, eighty-one million, six hundred eighty-seven thousand, fifty-two".