2001501166 has 16 divisors (see below), whose sum is σ = 3442862304. Its totient is φ = 854856864.

The previous prime is 2001501163. The next prime is 2001501167. The reversal of 2001501166 is 6611051002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001501163) 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, 239865 + ... + 248068.

It is an arithmetic number, because the mean of its divisors is an integer number (215178894).

Almost surely, 2^2001501166 is an apocalyptic number.

2001501166 is a deficient number, since it is larger than the sum of its proper divisors (1441361138).

2001501166 is a wasteful number, since it uses less digits than its factorization.

2001501166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488235.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 2001501166 is about 44738.1399479236. The cubic root of 2001501166 is about 1260.2361961673.

Adding to 2001501166 its reverse (6611051002), we get a palindrome (8612552168).

The spelling of 2001501166 in words is "two billion, one million, five hundred one thousand, one hundred sixty-six".