2665980 has 48 divisors (see below), whose sum is σ = 8295840. Its totient is φ = 710784.

The previous prime is 2665973. The next prime is 2666021. The reversal of 2665980 is 895662.

2665980 = T₂₁₅ + T₂₁₆ + ... + T₂₉₅.

2665980 is a `hidden beast` number, since 2 + 66 + 598 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1929 + ... + 3008.

It is an arithmetic number, because the mean of its divisors is an integer number (172830).

2^2665980 is an apocalyptic number.

2665980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2665980 is an abundant number, since it is smaller than the sum of its proper divisors (5629860).

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

2665980 is a wasteful number, since it uses less digits than its factorization.

2665980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4955 (or 4947 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 2665980 is about 1632.7829004494. The cubic root of 2665980 is about 138.6603511465.

The spelling of 2665980 in words is "two million, six hundred sixty-five thousand, nine hundred eighty".