42366681 has 24 divisors (see below), whose sum is σ = 70628480. Its totient is φ = 23970816.

The previous prime is 42366679. The next prime is 42366683. The reversal of 42366681 is 18666324.

42366681 = T₁₇₅₈ + T₁₇₅₉ + ... + T₁₇₈₄.

It is an interprime number because it is at equal distance from previous prime (42366679) and next prime (42366683).

It is not a de Polignac number, because 42366681 - 2¹ = 42366679 is a prime.

It is a super-2 number, since 2×42366681² = 3589871317911522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42366683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3225 + ... + 9753.

Almost surely, 2^42366681 is an apocalyptic number.

It is an amenable number.

42366681 is a deficient number, since it is larger than the sum of its proper divisors (28261799).

42366681 is a wasteful number, since it uses less digits than its factorization.

42366681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6645 (or 6642 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 42366681 is about 6508.9692732413. The cubic root of 42366681 is about 348.6113165008.

The spelling of 42366681 in words is "forty-two million, three hundred sixty-six thousand, six hundred eighty-one".