40739661 has 24 divisors (see below), whose sum is σ = 60049080. Its totient is φ = 26611200.

The previous prime is 40739659. The next prime is 40739681. The reversal of 40739661 is 16693704.

It can be written as a sum of positive squares in 4 ways, for example, as 22500 + 40717161 = 150^2 + 6381^2 .

It is not a de Polignac number, because 40739661 - 2¹ = 40739659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40739651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144841 + ... + 145121.

It is an arithmetic number, because the mean of its divisors is an integer number (2502045).

Almost surely, 2^40739661 is an apocalyptic number.

It is an amenable number.

40739661 is a deficient number, since it is larger than the sum of its proper divisors (19309419).

40739661 is a wasteful number, since it uses less digits than its factorization.

40739661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 40739661 is about 6382.7628030501. The cubic root of 40739661 is about 344.0903319877.

The spelling of 40739661 in words is "forty million, seven hundred thirty-nine thousand, six hundred sixty-one".