40165900660 has 12 divisors (see below), whose sum is σ = 84348391428. Its totient is φ = 16066360256.

The previous prime is 40165900651. The next prime is 40165900673. The reversal of 40165900660 is 6600956104.

It can be written as a sum of positive squares in 2 ways, for example, as 19674550756 + 20491349904 = 140266^2 + 143148^2 .

It is a super-2 number, since 2×40165900660² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004147497 + ... + 1004147536.

It is an arithmetic number, because the mean of its divisors is an integer number (7029032619).

Almost surely, 2^40165900660 is an apocalyptic number.

It is an amenable number.

40165900660 is an abundant number, since it is smaller than the sum of its proper divisors (44182490768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40165900660 is a wasteful number, since it uses less digits than its factorization.

40165900660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008295042 (or 2008295040 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 40165900660 in words is "forty billion, one hundred sixty-five million, nine hundred thousand, six hundred sixty".