2660121408 has 224 divisors, whose sum is σ = 8479129600. Its totient is φ = 734952960.

The previous prime is 2660121407. The next prime is 2660121413. The reversal of 2660121408 is 8041210662.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660121403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2040885 + ... + 2042187.

Almost surely, 2^2660121408 is an apocalyptic number.

2660121408 is a gapful number since it is divisible by the number (28) 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 2660121408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4239564800).

2660121408 is an abundant number, since it is smaller than the sum of its proper divisors (5819008192).

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

2660121408 is a wasteful number, since it uses less digits than its factorization.

2660121408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 2660121408 is about 51576.3648195566. The cubic root of 2660121408 is about 1385.5870619646.

The spelling of 2660121408 in words is "two billion, six hundred sixty million, one hundred twenty-one thousand, four hundred eight".