2151666104 has 128 divisors (see below), whose sum is σ = 4896460800. Its totient is φ = 867179520.

The previous prime is 2151666071. The next prime is 2151666133. The reversal of 2151666104 is 4016661512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15705524 + ... + 15705660.

It is an arithmetic number, because the mean of its divisors is an integer number (38253600).

Almost surely, 2^2151666104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2151666104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2448230400).

2151666104 is an abundant number, since it is smaller than the sum of its proper divisors (2744794696).

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

2151666104 is a wasteful number, since it uses less digits than its factorization.

2151666104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 2151666104 is about 46386.0550596836. The cubic root of 2151666104 is about 1290.9961866215.

The spelling of 2151666104 in words is "two billion, one hundred fifty-one million, six hundred sixty-six thousand, one hundred four".