41661564 has 36 divisors (see below), whose sum is σ = 113082984. Its totient is φ = 11903136.

The previous prime is 41661553. The next prime is 41661619. The reversal of 41661564 is 46516614.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34839 + ... + 36014.

It is an arithmetic number, because the mean of its divisors is an integer number (3141194).

Almost surely, 2^41661564 is an apocalyptic number.

It is an amenable number.

41661564 is an abundant number, since it is smaller than the sum of its proper divisors (71421420).

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

41661564 is a wasteful number, since it uses less digits than its factorization.

41661564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70874 (or 70865 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 41661564 is about 6454.5769807169. The cubic root of 41661564 is about 346.6664846317. Note that the first 3 decimals are identical.

The spelling of 41661564 in words is "forty-one million, six hundred sixty-one thousand, five hundred sixty-four".