1305466665 has 16 divisors (see below), whose sum is σ = 2117361408. Its totient is φ = 686710656.

The previous prime is 1305466651. The next prime is 1305466693. The reversal of 1305466665 is 5666645031.

It is not a de Polignac number, because 1305466665 - 2⁵ = 1305466633 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 595009 + ... + 597198.

It is an arithmetic number, because the mean of its divisors is an integer number (132335088).

Almost surely, 2^1305466665 is an apocalyptic number.

1305466665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1305466665 is a deficient number, since it is larger than the sum of its proper divisors (811894743).

1305466665 is a wasteful number, since it uses less digits than its factorization.

1305466665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192288.

The product of its (nonzero) digits is 388800, while the sum is 42.

The square root of 1305466665 is about 36131.2422288523. The cubic root of 1305466665 is about 1092.9205588998.

The spelling of 1305466665 in words is "one billion, three hundred five million, four hundred sixty-six thousand, six hundred sixty-five".