42266661 has 4 divisors (see below), whose sum is σ = 56355552. Its totient is φ = 28177772.

The previous prime is 42266657. The next prime is 42266669. The reversal of 42266661 is 16666224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42266661 - 2² = 42266657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42266669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7044441 + ... + 7044446.

It is an arithmetic number, because the mean of its divisors is an integer number (14088888).

Almost surely, 2^42266661 is an apocalyptic number.

It is an amenable number.

42266661 is a deficient number, since it is larger than the sum of its proper divisors (14088891).

42266661 is a wasteful number, since it uses less digits than its factorization.

42266661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14088890.

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

The square root of 42266661 is about 6501.2814890604. The cubic root of 42266661 is about 348.3367644379.

The spelling of 42266661 in words is "forty-two million, two hundred sixty-six thousand, six hundred sixty-one".