1866685349 has 8 divisors (see below), whose sum is σ = 1884257760. Its totient is φ = 1849172400.

The previous prime is 1866685321. The next prime is 1866685393. The reversal of 1866685349 is 9435866681.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1866685349 - 2²⁴ = 1849908133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1866685294 and 1866685303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866685309) 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, 49514 + ... + 78644.

It is an arithmetic number, because the mean of its divisors is an integer number (235532220).

Almost surely, 2^1866685349 is an apocalyptic number.

It is an amenable number.

1866685349 is a deficient number, since it is larger than the sum of its proper divisors (17572411).

1866685349 is a wasteful number, since it uses less digits than its factorization.

1866685349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29731.

The product of its digits is 7464960, while the sum is 56.

The square root of 1866685349 is about 43205.1541948412. The cubic root of 1866685349 is about 1231.2806079845.

The spelling of 1866685349 in words is "one billion, eight hundred sixty-six million, six hundred eighty-five thousand, three hundred forty-nine".