2661924005 has 16 divisors (see below), whose sum is σ = 3642380784. Its totient is φ = 1850096640.

The previous prime is 2661923963. The next prime is 2661924011. The reversal of 2661924005 is 5004291662.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4418404 + 2657505601 = 2102^2 + 51551^2 .

It is not a de Polignac number, because 2661924005 - 2⁶ = 2661923941 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1203386 + ... + 1205595.

It is an arithmetic number, because the mean of its divisors is an integer number (227648799).

Almost surely, 2^2661924005 is an apocalyptic number.

It is an amenable number.

2661924005 is a deficient number, since it is larger than the sum of its proper divisors (980456779).

2661924005 is a wasteful number, since it uses less digits than its factorization.

2661924005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409016.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 2661924005 is about 51593.8368896906. The cubic root of 2661924005 is about 1385.8999663704.

The spelling of 2661924005 in words is "two billion, six hundred sixty-one million, nine hundred twenty-four thousand, five".