42766685 has 16 divisors (see below), whose sum is σ = 56031024. Its totient is φ = 31145472.

The previous prime is 42766657. The next prime is 42766687. The reversal of 42766685 is 58666724.

It can be written as a sum of positive squares in 8 ways, for example, as 2647129 + 40119556 = 1627^2 + 6334^2 .

It is a cyclic number.

It is not a de Polignac number, because 42766685 - 2¹⁰ = 42765661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42766687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239 + ... + 9251.

It is an arithmetic number, because the mean of its divisors is an integer number (3501939).

Almost surely, 2^42766685 is an apocalyptic number.

It is an amenable number.

42766685 is a deficient number, since it is larger than the sum of its proper divisors (13264339).

42766685 is a wasteful number, since it uses less digits than its factorization.

42766685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9104.

The product of its digits is 483840, while the sum is 44.

The square root of 42766685 is about 6539.6242246784. The cubic root of 42766685 is about 349.7050167614.

The spelling of 42766685 in words is "forty-two million, seven hundred sixty-six thousand, six hundred eighty-five".