2061660 has 24 divisors (see below), whose sum is σ = 5772816. Its totient is φ = 549760.

The previous prime is 2061649. The next prime is 2061667. The reversal of 2061660 is 661602.

It is a plaindrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17121 + ... + 17240.

It is an arithmetic number, because the mean of its divisors is an integer number (240534).

2^2061660 is an apocalyptic number.

2061660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2061660 is an abundant number, since it is smaller than the sum of its proper divisors (3711156).

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

2061660 is a wasteful number, since it uses less digits than its factorization.

2061660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34373 (or 34371 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 2061660 is about 1435.8481813897. The cubic root of 2061660 is about 127.2738011660.

The spelling of 2061660 in words is "two million, sixty-one thousand, six hundred sixty".