40849661 has 8 divisors (see below), whose sum is σ = 43622400. Its totient is φ = 38167920.

The previous prime is 40849651. The next prime is 40849681. The reversal of 40849661 is 16694804.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40849661 - 2¹⁴ = 40833277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40849651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21821 + ... + 23618.

It is an arithmetic number, because the mean of its divisors is an integer number (5452800).

Almost surely, 2^40849661 is an apocalyptic number.

It is an amenable number.

40849661 is a deficient number, since it is larger than the sum of its proper divisors (2772739).

40849661 is a wasteful number, since it uses less digits than its factorization.

40849661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45499.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 40849661 is about 6391.3739524456. The cubic root of 40849661 is about 344.3997431835.

The spelling of 40849661 in words is "forty million, eight hundred forty-nine thousand, six hundred sixty-one".