665103081 has 16 divisors (see below), whose sum is σ = 923031360. Its totient is φ = 425476800.

The previous prime is 665103077. The next prime is 665103091. The reversal of 665103081 is 180301566.

It is not a de Polignac number, because 665103081 - 2² = 665103077 is a prime.

It is a super-2 number, since 2×665103081² = 884724216711385122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (665103031) 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, 9270 + ... + 37631.

It is an arithmetic number, because the mean of its divisors is an integer number (57689460).

Almost surely, 2^665103081 is an apocalyptic number.

It is an amenable number.

665103081 is a deficient number, since it is larger than the sum of its proper divisors (257928279).

665103081 is a wasteful number, since it uses less digits than its factorization.

665103081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47096.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 665103081 is about 25789.5924938724. The cubic root of 665103081 is about 872.8969711604.

The spelling of 665103081 in words is "six hundred sixty-five million, one hundred three thousand, eighty-one".