1868668887 has 8 divisors (see below), whose sum is σ = 2497012336. Its totient is φ = 1243052352.

The previous prime is 1868668877. The next prime is 1868668897. The reversal of 1868668887 is 7888668681.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1868668877) and next prime (1868668897).

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

It is a de Polignac number, because none of the positive numbers 2^k-1868668887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868668807) 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, 680128 + ... + 682869.

It is an arithmetic number, because the mean of its divisors is an integer number (312126542).

Almost surely, 2^1868668887 is an apocalyptic number.

1868668887 is a deficient number, since it is larger than the sum of its proper divisors (628343449).

1868668887 is a wasteful number, since it uses less digits than its factorization.

1868668887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363457.

The product of its digits is 49545216, while the sum is 66.

The square root of 1868668887 is about 43228.1029771143. The cubic root of 1868668887 is about 1231.7165727865.

The spelling of 1868668887 in words is "one billion, eight hundred sixty-eight million, six hundred sixty-eight thousand, eight hundred eighty-seven".