41666640 has 80 divisors (see below), whose sum is σ = 130200000. Its totient is φ = 11022336.

The previous prime is 41666633. The next prime is 41666657. The reversal of 41666640 is 4666614.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×41666640² = 3472217777779200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32736 + ... + 33984.

It is an arithmetic number, because the mean of its divisors is an integer number (1627500).

Almost surely, 2^41666640 is an apocalyptic number.

41666640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 41666640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65100000).

41666640 is an abundant number, since it is smaller than the sum of its proper divisors (88533360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

41666640 is a wasteful number, since it uses less digits than its factorization.

41666640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404 (or 1398 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 41666640 is about 6454.9701780876. The cubic root of 41666640 is about 346.6805632168.

The spelling of 41666640 in words is "forty-one million, six hundred sixty-six thousand, six hundred forty".