2664145081 has 8 divisors (see below), whose sum is σ = 2871343944. Its totient is φ = 2457269760.

The previous prime is 2664145073. The next prime is 2664145087. The reversal of 2664145081 is 1805414662.

It can be written as a sum of positive squares in 4 ways, for example, as 1585081 + 2662560000 = 1259^2 + 51600^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2664145081 - 2³ = 2664145073 is a prime.

It is a super-2 number, since 2×2664145081² = 14195338025232993122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2664145081.

It is not an unprimeable number, because it can be changed into a prime (2664145087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63640 + ... + 96841.

It is an arithmetic number, because the mean of its divisors is an integer number (358917993).

Almost surely, 2^2664145081 is an apocalyptic number.

It is an amenable number.

2664145081 is a deficient number, since it is larger than the sum of its proper divisors (207198863).

2664145081 is a wasteful number, since it uses less digits than its factorization.

2664145081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161771.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 2664145081 is about 51615.3570267609. The cubic root of 2664145081 is about 1386.2853183953.

The spelling of 2664145081 in words is "two billion, six hundred sixty-four million, one hundred forty-five thousand, eighty-one".