41666638 has 16 divisors (see below), whose sum is σ = 67759776. Its totient is φ = 19101600.

The previous prime is 41666633. The next prime is 41666657. The reversal of 41666638 is 83666614.

It is a super-2 number, since 2×41666638² = 3472217444446088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 41666638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41666633) 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, 1381 + ... + 9232.

It is an arithmetic number, because the mean of its divisors is an integer number (4234986).

Almost surely, 2^41666638 is an apocalyptic number.

41666638 is a deficient number, since it is larger than the sum of its proper divisors (26093138).

41666638 is a wasteful number, since it uses less digits than its factorization.

41666638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10779.

The product of its digits is 124416, while the sum is 40.

The square root of 41666638 is about 6454.9700231682. The cubic root of 41666638 is about 346.6805576699.

The spelling of 41666638 in words is "forty-one million, six hundred sixty-six thousand, six hundred thirty-eight".