40660065 has 24 divisors (see below), whose sum is σ = 72753408. Its totient is φ = 20985120.

The previous prime is 40660049. The next prime is 40660079. The reversal of 40660065 is 56006604.

It is not a de Polignac number, because 40660065 - 2⁴ = 40660049 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13179 + ... + 15968.

It is an arithmetic number, because the mean of its divisors is an integer number (3031392).

Almost surely, 2^40660065 is an apocalyptic number.

40660065 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40660065 is a deficient number, since it is larger than the sum of its proper divisors (32093343).

40660065 is a wasteful number, since it uses less digits than its factorization.

40660065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29189 (or 29186 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 40660065 is about 6376.5245235943. The cubic root of 40660065 is about 343.8660945611.

Adding to 40660065 its reverse (56006604), we get a palindrome (96666669).

The spelling of 40660065 in words is "forty million, six hundred sixty thousand, sixty-five".