2661660000 has 600 divisors, whose sum is σ = 10287756864. Its totient is φ = 673920000.

The previous prime is 2661659983. The next prime is 2661660013. The reversal of 2661660000 is 661662.

2661660000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (600).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 99 ways as a sum of consecutive naturals, for example, 50219974 + ... + 50220026.

Almost surely, 2^2661660000 is an apocalyptic number.

2661660000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2661660000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5143878432).

2661660000 is an abundant number, since it is smaller than the sum of its proper divisors (7626096864).

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

2661660000 is an equidigital number, since it uses as much as digits as its factorization.

2661660000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 2661660000 is about 51591.2783326794. The cubic root of 2661660000 is about 1385.8541478050.

The spelling of 2661660000 in words is "two billion, six hundred sixty-one million, six hundred sixty thousand".