5001661005 has 32 divisors (see below), whose sum is σ = 8734193280. Its totient is φ = 2423930880.

The previous prime is 5001661003. The next prime is 5001661079.

5001661005 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5001661005 - 2¹ = 5001661003 is a prime.

It is a super-2 number, since 2×5001661005² = 50033225617875220050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5001661003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 438049 + ... + 449321.

It is an arithmetic number, because the mean of its divisors is an integer number (272943540).

Almost surely, 2^5001661005 is an apocalyptic number.

5001661005 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5001661005 is a deficient number, since it is larger than the sum of its proper divisors (3732532275).

5001661005 is a wasteful number, since it uses less digits than its factorization.

5001661005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13981.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 5001661005 is about 70722.4222223758. The cubic root of 5001661005 is about 1710.1652776194.

The spelling of 5001661005 in words is "five billion, one million, six hundred sixty-one thousand, five".