2663784986 has 4 divisors (see below), whose sum is σ = 3995677482. Its totient is φ = 1331892492.

The previous prime is 2663784983. The next prime is 2663785001. The reversal of 2663784986 is 6894873662.

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., 2528178961 + 135606025 = 50281^2 + 11645^2 .

It is not an unprimeable number, because it can be changed into a prime (2663784983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665946245 + ... + 665946248.

Almost surely, 2^2663784986 is an apocalyptic number.

2663784986 is a deficient number, since it is larger than the sum of its proper divisors (1331892496).

2663784986 is a wasteful number, since it uses less digits than its factorization.

2663784986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331892495.

The product of its digits is 20901888, while the sum is 59.

The square root of 2663784986 is about 51611.8686544093. The cubic root of 2663784986 is about 1386.2228572193. Note that the first 3 decimals are identical.

The spelling of 2663784986 in words is "two billion, six hundred sixty-three million, seven hundred eighty-four thousand, nine hundred eighty-six".