40661072 has 20 divisors (see below), whose sum is σ = 79025076. Its totient is φ = 20267520.

The previous prime is 40661051. The next prime is 40661087. The reversal of 40661072 is 27016604.

It can be written as a sum of positive squares in 2 ways, for example, as 7529536 + 33131536 = 2744^2 + 5756^2 .

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, 1622 + ... + 9162.

Almost surely, 2^40661072 is an apocalyptic number.

It is an amenable number.

40661072 is a deficient number, since it is larger than the sum of its proper divisors (38364004).

40661072 is a wasteful number, since it uses less digits than its factorization.

40661072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7886 (or 7880 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 40661072 is about 6376.6034846147. The cubic root of 40661072 is about 343.8689333031.

Adding to 40661072 its reverse (27016604), we get a palindrome (67677676).

The spelling of 40661072 in words is "forty million, six hundred sixty-one thousand, seventy-two".