1866974348990 has 16 divisors (see below), whose sum is σ = 3363283788480. Its totient is φ = 746183081760.

The previous prime is 1866974348977. The next prime is 1866974348999. The reversal of 1866974348990 is 998434796681.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866974348999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75819305 + ... + 75843924.

It is an arithmetic number, because the mean of its divisors is an integer number (210205236780).

Almost surely, 2^{1866974348990} is an apocalyptic number.

1866974348990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1866974348990 is a deficient number, since it is larger than the sum of its proper divisors (1496309439490).

1866974348990 is a wasteful number, since it uses less digits than its factorization.

1866974348990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151664467.

The product of its (nonzero) digits is 564350976, while the sum is 74.

The spelling of 1866974348990 in words is "one trillion, eight hundred sixty-six billion, nine hundred seventy-four million, three hundred forty-eight thousand, nine hundred ninety".