1366909887 has 8 divisors (see below), whose sum is σ = 2082910336. Its totient is φ = 781091352.

The previous prime is 1366909853. The next prime is 1366909891. The reversal of 1366909887 is 7889096631.

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

It is not a de Polignac number, because 1366909887 - 2⁸ = 1366909631 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 (1366909897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32545453 + ... + 32545494.

It is an arithmetic number, because the mean of its divisors is an integer number (260363792).

Almost surely, 2^1366909887 is an apocalyptic number.

1366909887 is a deficient number, since it is larger than the sum of its proper divisors (716000449).

1366909887 is an equidigital number, since it uses as much as digits as its factorization.

1366909887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65090957.

The product of its (nonzero) digits is 3919104, while the sum is 57.

The square root of 1366909887 is about 36971.7444408565. The cubic root of 1366909887 is about 1109.8048752055.

The spelling of 1366909887 in words is "one billion, three hundred sixty-six million, nine hundred nine thousand, eight hundred eighty-seven".