2661166742 has 16 divisors (see below), whose sum is σ = 4300058112. Its totient is φ = 1227873600.

The previous prime is 2661166741. The next prime is 2661166777. The reversal of 2661166742 is 2476611662.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2661166742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661166741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90242 + ... + 116042.

It is an arithmetic number, because the mean of its divisors is an integer number (268753632).

Almost surely, 2^2661166742 is an apocalyptic number.

2661166742 is a deficient number, since it is larger than the sum of its proper divisors (1638891370).

2661166742 is a wasteful number, since it uses less digits than its factorization.

2661166742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29783.

The product of its digits is 145152, while the sum is 41.

The square root of 2661166742 is about 51586.4976713868. The cubic root of 2661166742 is about 1385.7685338302.

The spelling of 2661166742 in words is "two billion, six hundred sixty-one million, one hundred sixty-six thousand, seven hundred forty-two".