41666639 has 32 divisors (see below), whose sum is σ = 53498880. Its totient is φ = 31629312.

The previous prime is 41666633. The next prime is 41666657. The reversal of 41666639 is 93666614.

It is a cyclic number.

It is not a de Polignac number, because 41666639 - 2⁴ = 41666623 is a prime.

It is a super-2 number, since 2×41666639² = 3472217611112642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 41666596 and 41666605.

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 31 ways as a sum of consecutive naturals, for example, 161999 + ... + 162255.

It is an arithmetic number, because the mean of its divisors is an integer number (1671840).

Almost surely, 2^41666639 is an apocalyptic number.

41666639 is a deficient number, since it is larger than the sum of its proper divisors (11832241).

41666639 is a wasteful number, since it uses less digits than its factorization.

41666639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359.

The product of its digits is 139968, while the sum is 41.

The square root of 41666639 is about 6454.9701006279. The cubic root of 41666639 is about 346.6805604433.

The spelling of 41666639 in words is "forty-one million, six hundred sixty-six thousand, six hundred thirty-nine".