2660165997 has 8 divisors (see below), whose sum is σ = 3556007520. Its totient is φ = 1768884240.

The previous prime is 2660165971. The next prime is 2660166043. The reversal of 2660165997 is 7995610662.

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

It is not a de Polignac number, because 2660165997 - 2¹¹ = 2660163949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660165197) 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 7 ways as a sum of consecutive naturals, for example, 1138579 + ... + 1140912.

It is an arithmetic number, because the mean of its divisors is an integer number (444500940).

Almost surely, 2^2660165997 is an apocalyptic number.

It is an amenable number.

2660165997 is a deficient number, since it is larger than the sum of its proper divisors (895841523).

2660165997 is a wasteful number, since it uses less digits than its factorization.

2660165997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279883.

The product of its (nonzero) digits is 1224720, while the sum is 51.

The square root of 2660165997 is about 51576.7970796947. The cubic root of 2660165997 is about 1385.5948036659.

The spelling of 2660165997 in words is "two billion, six hundred sixty million, one hundred sixty-five thousand, nine hundred ninety-seven".