2661107901 has 4 divisors (see below), whose sum is σ = 3548143872. Its totient is φ = 1774071932.

The previous prime is 2661107873. The next prime is 2661107923. The reversal of 2661107901 is 1097011662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2661107901 - 2¹⁵ = 2661075133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661107951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443517981 + ... + 443517986.

It is an arithmetic number, because the mean of its divisors is an integer number (887035968).

Almost surely, 2^2661107901 is an apocalyptic number.

It is an amenable number.

2661107901 is a deficient number, since it is larger than the sum of its proper divisors (887035971).

2661107901 is an equidigital number, since it uses as much as digits as its factorization.

2661107901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887035970.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 2661107901 is about 51585.9273542698. The cubic root of 2661107901 is about 1385.7583201889.

The spelling of 2661107901 in words is "two billion, six hundred sixty-one million, one hundred seven thousand, nine hundred one".