42661611 has 12 divisors (see below), whose sum is σ = 63610560. Its totient is φ = 27523440.

The previous prime is 42661609. The next prime is 42661621. The reversal of 42661611 is 11616624.

42661611 is a `hidden beast` number, since 42 + 6 + 6 + 1 + 611 = 666.

It is not a de Polignac number, because 42661611 - 2¹ = 42661609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42661621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76176 + ... + 76733.

It is an arithmetic number, because the mean of its divisors is an integer number (5300880).

Almost surely, 2^42661611 is an apocalyptic number.

42661611 is a deficient number, since it is larger than the sum of its proper divisors (20948949).

42661611 is a wasteful number, since it uses less digits than its factorization.

42661611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152946 (or 152943 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 42661611 is about 6531.5856420934. The cubic root of 42661611 is about 349.4183836880.

The spelling of 42661611 in words is "forty-two million, six hundred sixty-one thousand, six hundred eleven".