1351705665 has 16 divisors (see below), whose sum is σ = 2208745728. Its totient is φ = 705570816.

The previous prime is 1351705651. The next prime is 1351705669. The reversal of 1351705665 is 5665071531.

It is not a de Polignac number, because 1351705665 - 2⁶ = 1351705601 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1351705669) 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, 957952 + ... + 959361.

It is an arithmetic number, because the mean of its divisors is an integer number (138046608).

Almost surely, 2^1351705665 is an apocalyptic number.

1351705665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1351705665 is a deficient number, since it is larger than the sum of its proper divisors (857040063).

1351705665 is a wasteful number, since it uses less digits than its factorization.

1351705665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917368.

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 1351705665 is about 36765.5499754866. The cubic root of 1351705665 is about 1105.6747147062.

The spelling of 1351705665 in words is "one billion, three hundred fifty-one million, seven hundred five thousand, six hundred sixty-five".