1378714665 has 16 divisors (see below), whose sum is σ = 2282011200. Its totient is φ = 709958592.

The previous prime is 1378714663. The next prime is 1378714669. The reversal of 1378714665 is 5664178731.

It is not a de Polignac number, because 1378714665 - 2¹ = 1378714663 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1378714661) 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, 1584295 + ... + 1585164.

It is an arithmetic number, because the mean of its divisors is an integer number (142625700).

Almost surely, 2^1378714665 is an apocalyptic number.

1378714665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378714665 is a deficient number, since it is larger than the sum of its proper divisors (903296535).

1378714665 is a wasteful number, since it uses less digits than its factorization.

1378714665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169496.

The product of its digits is 846720, while the sum is 48.

The square root of 1378714665 is about 37131.0471842635. The cubic root of 1378714665 is about 1112.9905195399.

The spelling of 1378714665 in words is "one billion, three hundred seventy-eight million, seven hundred fourteen thousand, six hundred sixty-five".