2661331001 has 8 divisors (see below), whose sum is σ = 3047340864. Its totient is φ = 2276776080.

The previous prime is 2661330979. The next prime is 2661331003. The reversal of 2661331001 is 1001331662.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2661331001 - 2⁶ = 2661330937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2661331003) 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, 359810 + ... + 367131.

It is an arithmetic number, because the mean of its divisors is an integer number (380917608).

Almost surely, 2^2661331001 is an apocalyptic number.

It is an amenable number.

2661331001 is a deficient number, since it is larger than the sum of its proper divisors (386009863).

2661331001 is an equidigital number, since it uses as much as digits as its factorization.

2661331001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727471.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 2661331001 is about 51588.0897203996. The cubic root of 2661331001 is about 1385.7970451678.

Adding to 2661331001 its reverse (1001331662), we get a palindrome (3662662663).

The spelling of 2661331001 in words is "two billion, six hundred sixty-one million, three hundred thirty-one thousand, one".