1001665055 has 16 divisors (see below), whose sum is σ = 1232431200. Its totient is φ = 781079040.

The previous prime is 1001665037. The next prime is 1001665057. The reversal of 1001665055 is 5505661001.

It is not a de Polignac number, because 1001665055 - 2⁶ = 1001664991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001665057) 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 15 ways as a sum of consecutive naturals, for example, 427076 + ... + 429414.

It is an arithmetic number, because the mean of its divisors is an integer number (77026950).

Almost surely, 2^1001665055 is an apocalyptic number.

1001665055 is a deficient number, since it is larger than the sum of its proper divisors (230766145).

1001665055 is a wasteful number, since it uses less digits than its factorization.

1001665055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4474.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1001665055 is about 31649.0924830397. The cubic root of 1001665055 is about 1000.5547105726.

The spelling of 1001665055 in words is "one billion, one million, six hundred sixty-five thousand, fifty-five".