41665642 has 4 divisors (see below), whose sum is σ = 62498466. Its totient is φ = 20832820.

The previous prime is 41665639. The next prime is 41665709. The reversal of 41665642 is 24656614.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24656614 = 2 ⋅12328307.

It can be written as a sum of positive squares in only one way, i.e., 24117921 + 17547721 = 4911^2 + 4189^2 .

It is a junction number, because it is equal to n+sod(n) for n = 41665598 and 41665607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10416409 + ... + 10416412.

Almost surely, 2^41665642 is an apocalyptic number.

41665642 is a deficient number, since it is larger than the sum of its proper divisors (20832824).

41665642 is a wasteful number, since it uses less digits than its factorization.

41665642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20832823.

The product of its digits is 34560, while the sum is 34.

The square root of 41665642 is about 6454.8928728523. The cubic root of 41665642 is about 346.6777952953.

Subtracting from 41665642 its reverse (24656614), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 41665642 in words is "forty-one million, six hundred sixty-five thousand, six hundred forty-two".