1665081465 has 8 divisors (see below), whose sum is σ = 2664130368. Its totient is φ = 888043440.

The previous prime is 1665081427. The next prime is 1665081503. The reversal of 1665081465 is 5641805661.

It is an interprime number because it is at equal distance from previous prime (1665081427) and next prime (1665081503).

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

It is not a de Polignac number, because 1665081465 - 2¹⁴ = 1665065081 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55502701 + ... + 55502730.

It is an arithmetic number, because the mean of its divisors is an integer number (333016296).

Almost surely, 2^1665081465 is an apocalyptic number.

1665081465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1665081465 is a deficient number, since it is larger than the sum of its proper divisors (999048903).

1665081465 is a wasteful number, since it uses less digits than its factorization.

1665081465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111005439.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 1665081465 is about 40805.4097516494. The cubic root of 1665081465 is about 1185.2550893808.

The spelling of 1665081465 in words is "one billion, six hundred sixty-five million, eighty-one thousand, four hundred sixty-five".