2661745000 has 40 divisors (see below), whose sum is σ = 6236480250. Its totient is φ = 1064696000.

The previous prime is 2661744991. The next prime is 2661745013. The reversal of 2661745000 is 5471662.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 382828356 + 2278916644 = 19566^2 + 47738^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 261175 + ... + 271174.

Almost surely, 2^2661745000 is an apocalyptic number.

2661745000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2661745000 is an abundant number, since it is smaller than the sum of its proper divisors (3574735250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2661745000 is an equidigital number, since it uses as much as digits as its factorization.

2661745000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532375 (or 532356 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2661745000 is about 51592.1021087530. The cubic root of 2661745000 is about 1385.8689000459.

It can be divided in two parts, 26617 and 45000, that added together give a palindrome (71617).

The spelling of 2661745000 in words is "two billion, six hundred sixty-one million, seven hundred forty-five thousand".