1380665611 has 24 divisors (see below), whose sum is σ = 1584545760. Its totient is φ = 1200326400.

The previous prime is 1380665567. The next prime is 1380665621. The reversal of 1380665611 is 1165660831.

It is not a de Polignac number, because 1380665611 - 2⁷ = 1380665483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1380665621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197506 + ... + 204376.

It is an arithmetic number, because the mean of its divisors is an integer number (66022740).

Almost surely, 2^1380665611 is an apocalyptic number.

1380665611 is a deficient number, since it is larger than the sum of its proper divisors (203880149).

1380665611 is a wasteful number, since it uses less digits than its factorization.

1380665611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6967 (or 6954 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1380665611 is about 37157.3089849090. The cubic root of 1380665611 is about 1113.5152500632.

The spelling of 1380665611 in words is "one billion, three hundred eighty million, six hundred sixty-five thousand, six hundred eleven".