1665640264341 has 32 divisors (see below), whose sum is σ = 2315758072320. Its totient is φ = 1064086732800.

The previous prime is 1665640264331. The next prime is 1665640264357. The reversal of 1665640264341 is 1434620465661.

It is not a de Polignac number, because 1665640264341 - 2²⁵ = 1665606709909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665640264331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1431301 + ... + 2319461.

It is an arithmetic number, because the mean of its divisors is an integer number (72367439760).

Almost surely, 2^{1665640264341} is an apocalyptic number.

It is an amenable number.

1665640264341 is a deficient number, since it is larger than the sum of its proper divisors (650117807979).

1665640264341 is a wasteful number, since it uses less digits than its factorization.

1665640264341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888477.

The product of its (nonzero) digits is 2488320, while the sum is 48.

The spelling of 1665640264341 in words is "one trillion, six hundred sixty-five billion, six hundred forty million, two hundred sixty-four thousand, three hundred forty-one".