40073661 has 12 divisors (see below), whose sum is σ = 57978492. Its totient is φ = 26672256.

The previous prime is 40073653. The next prime is 40073711. The reversal of 40073661 is 16637004.

It can be written as a sum of positive squares in 2 ways, for example, as 39765636 + 308025 = 6306^2 + 555^2 .

It is not a de Polignac number, because 40073661 - 2³ = 40073653 is a prime.

It is a Curzon number.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40073611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2805 + ... + 9381.

It is an arithmetic number, because the mean of its divisors is an integer number (4831541).

Almost surely, 2^40073661 is an apocalyptic number.

It is an amenable number.

40073661 is a deficient number, since it is larger than the sum of its proper divisors (17904831).

40073661 is a wasteful number, since it uses less digits than its factorization.

40073661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7260 (or 7257 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 40073661 is about 6330.3760551803. The cubic root of 40073661 is about 342.2049914997.

The spelling of 40073661 in words is "forty million, seventy-three thousand, six hundred sixty-one".