1866738742 has 16 divisors (see below), whose sum is σ = 3187475712. Its totient is φ = 811625320.

The previous prime is 1866738739. The next prime is 1866738743. The reversal of 1866738742 is 2478376681.

It is a self number, because there is not a number n which added to its sum of digits gives 1866738742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866738743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1844098 + ... + 1845109.

It is an arithmetic number, because the mean of its divisors is an integer number (199217232).

Almost surely, 2^1866738742 is an apocalyptic number.

1866738742 is a deficient number, since it is larger than the sum of its proper divisors (1320736970).

1866738742 is a wasteful number, since it uses less digits than its factorization.

1866738742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689243.

The product of its digits is 2709504, while the sum is 52.

The square root of 1866738742 is about 43205.7720912380. The cubic root of 1866738742 is about 1231.2923473561.

The spelling of 1866738742 in words is "one billion, eight hundred sixty-six million, seven hundred thirty-eight thousand, seven hundred forty-two".