8001010661 has 16 divisors (see below), whose sum is σ = 9313781760. Its totient is φ = 6731536560.

The previous prime is 8001010639. The next prime is 8001010669. The reversal of 8001010661 is 1660101008.

It is a happy number.

It is not a de Polignac number, because 8001010661 - 2⁶ = 8001010597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8001010669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77360 + ... + 148278.

It is an arithmetic number, because the mean of its divisors is an integer number (582111360).

Almost surely, 2^8001010661 is an apocalyptic number.

It is an amenable number.

8001010661 is a deficient number, since it is larger than the sum of its proper divisors (1312771099).

8001010661 is a wasteful number, since it uses less digits than its factorization.

8001010661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71224.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 8001010661 is about 89448.3686883109. The cubic root of 8001010661 is about 2000.0842182036.

Adding to 8001010661 its reverse (1660101008), we get a palindrome (9661111669).

The spelling of 8001010661 in words is "eight billion, one million, ten thousand, six hundred sixty-one".