2501660 has 48 divisors (see below), whose sum is σ = 6096384. Its totient is φ = 844608.

The previous prime is 2501657. The next prime is 2501677. The reversal of 2501660 is 661052.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 14897 + ... + 15063.

It is an arithmetic number, because the mean of its divisors is an integer number (127008).

2^2501660 is an apocalyptic number.

2501660 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 2501660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3048192).

2501660 is an abundant number, since it is smaller than the sum of its proper divisors (3594724).

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

2501660 is a wasteful number, since it uses less digits than its factorization.

2501660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2501660 is about 1581.6636810650. The cubic root of 2501660 is about 135.7509137384.

The spelling of 2501660 in words is "two million, five hundred one thousand, six hundred sixty".