41666647 has 4 divisors (see below), whose sum is σ = 45454536. Its totient is φ = 37878760.

The previous prime is 41666633. The next prime is 41666657. The reversal of 41666647 is 74666614.

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-41666647 is a prime.

It is a super-2 number, since 2×41666647² = 3472218944445218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41666657) 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, 1893928 + ... + 1893949.

It is an arithmetic number, because the mean of its divisors is an integer number (11363634).

Almost surely, 2^41666647 is an apocalyptic number.

41666647 is a deficient number, since it is larger than the sum of its proper divisors (3787889).

41666647 is a wasteful number, since it uses less digits than its factorization.

41666647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3787888.

The product of its digits is 145152, while the sum is 40.

The square root of 41666647 is about 6454.9707203054. The cubic root of 41666647 is about 346.6805826309.

The spelling of 41666647 in words is "forty-one million, six hundred sixty-six thousand, six hundred forty-seven".