2066149805 has 16 divisors (see below), whose sum is σ = 2597356800. Its totient is φ = 1575712320.

The previous prime is 2066149763. The next prime is 2066149807. The reversal of 2066149805 is 5089416602.

2066149805 = 5940² + 5941² + ... + 5997².

It is a happy number.

It is not a de Polignac number, because 2066149805 - 2¹⁰ = 2066148781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066149807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78731 + ... + 101640.

It is an arithmetic number, because the mean of its divisors is an integer number (162334800).

Almost surely, 2^2066149805 is an apocalyptic number.

It is an amenable number.

2066149805 is a deficient number, since it is larger than the sum of its proper divisors (531206995).

2066149805 is a wasteful number, since it uses less digits than its factorization.

2066149805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180484.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 2066149805 is about 45454.9205807248. The cubic root of 2066149805 is about 1273.6612486527.

The spelling of 2066149805 in words is "two billion, sixty-six million, one hundred forty-nine thousand, eight hundred five".