2180966 has 4 divisors (see below), whose sum is σ = 3271452. Its totient is φ = 1090482.

The previous prime is 2180963. The next prime is 2180993. The reversal of 2180966 is 6690812.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2180966² = 9513225386312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545240 + ... + 545243.

It is an arithmetic number, because the mean of its divisors is an integer number (817863).

2^2180966 is an apocalyptic number.

2180966 is a deficient number, since it is larger than the sum of its proper divisors (1090486).

2180966 is a wasteful number, since it uses less digits than its factorization.

2180966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090485.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2180966 is about 1476.8093986700. The cubic root of 2180966 is about 129.6829750490.

The spelling of 2180966 in words is "two million, one hundred eighty thousand, nine hundred sixty-six".