90660040 has 16 divisors (see below), whose sum is σ = 203985180. Its totient is φ = 36264000.

The previous prime is 90660029. The next prime is 90660041. The reversal of 90660040 is 4006609.

It can be written as a sum of positive squares in 2 ways, for example, as 73170916 + 17489124 = 8554^2 + 4182^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90659987 and 90660014.

It is not an unprimeable number, because it can be changed into a prime (90660041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1133211 + ... + 1133290.

Almost surely, 2^90660040 is an apocalyptic number.

It is an amenable number.

90660040 is an abundant number, since it is smaller than the sum of its proper divisors (113325140).

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

90660040 is a wasteful number, since it uses less digits than its factorization.

90660040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266512 (or 2266508 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 90660040 is about 9521.5565954312. The cubic root of 90660040 is about 449.2333282966.

Adding to 90660040 its reverse (4006609), we get a palindrome (94666649).

The spelling of 90660040 in words is "ninety million, six hundred sixty thousand, forty".