40665630523 has 24 divisors (see below), whose sum is σ = 48959078400. Its totient is φ = 33643305360.

The previous prime is 40665630497. The next prime is 40665630529. The reversal of 40665630523 is 32503656604.

It is not a de Polignac number, because 40665630523 - 2²⁹ = 40128759611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40665630529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 546828 + ... + 616726.

It is an arithmetic number, because the mean of its divisors is an integer number (2039961600).

Almost surely, 2^40665630523 is an apocalyptic number.

40665630523 is a deficient number, since it is larger than the sum of its proper divisors (8293447877).

40665630523 is a wasteful number, since it uses less digits than its factorization.

40665630523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70327 (or 70320 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 40.

The spelling of 40665630523 in words is "forty billion, six hundred sixty-five million, six hundred thirty thousand, five hundred twenty-three".