1866738741 has 16 divisors (see below), whose sum is σ = 2902608000. Its totient is φ = 1066707264.

The previous prime is 1866738739. The next prime is 1866738743. The reversal of 1866738741 is 1478376681.

It is an interprime number because it is at equal distance from previous prime (1866738739) and next prime (1866738743).

It is not a de Polignac number, because 1866738741 - 2¹ = 1866738739 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 906036 + ... + 908093.

It is an arithmetic number, because the mean of its divisors is an integer number (181413000).

Almost surely, 2^1866738741 is an apocalyptic number.

It is an amenable number.

1866738741 is a deficient number, since it is larger than the sum of its proper divisors (1035869259).

1866738741 is an equidigital number, since it uses as much as digits as its factorization.

1866738741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814153 (or 1814139 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The square root of 1866738741 is about 43205.7720796655. The cubic root of 1866738741 is about 1231.2923471362.

The spelling of 1866738741 in words is "one billion, eight hundred sixty-six million, seven hundred thirty-eight thousand, seven hundred forty-one".