2660986 has 4 divisors (see below), whose sum is σ = 3991482. Its totient is φ = 1330492.

The previous prime is 2660963. The next prime is 2660989. The reversal of 2660986 is 6890662.

2660986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 1610361 + 1050625 = 1269^2 + 1025^2 .

It is not an unprimeable number, because it can be changed into a prime (2660989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665245 + ... + 665248.

2^2660986 is an apocalyptic number.

2660986 is a deficient number, since it is larger than the sum of its proper divisors (1330496).

2660986 is a wasteful number, since it uses less digits than its factorization.

2660986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330495.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 2660986 is about 1631.2528927177. The cubic root of 2660986 is about 138.5737160092.

The spelling of 2660986 in words is "two million, six hundred sixty thousand, nine hundred eighty-six".