41661691 has 4 divisors (see below), whose sum is σ = 41729832. Its totient is φ = 41593552.

The previous prime is 41661673. The next prime is 41661703. The reversal of 41661691 is 19616614.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41661691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41661391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33145 + ... + 34378.

It is an arithmetic number, because the mean of its divisors is an integer number (10432458).

Almost surely, 2^41661691 is an apocalyptic number.

41661691 is a deficient number, since it is larger than the sum of its proper divisors (68141).

41661691 is an equidigital number, since it uses as much as digits as its factorization.

41661691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68140.

The product of its digits is 7776, while the sum is 34.

The square root of 41661691 is about 6454.5868186895. The cubic root of 41661691 is about 346.6668368877. Note that the first 3 decimals are identical.

The spelling of 41661691 in words is "forty-one million, six hundred sixty-one thousand, six hundred ninety-one".