2678600066 has 4 divisors (see below), whose sum is σ = 4017900102. Its totient is φ = 1339300032.

The previous prime is 2678600039. The next prime is 2678600129. The reversal of 2678600066 is 6600068762.

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., 1825083841 + 853516225 = 42721^2 + 29215^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2678599996 and 2678600032.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669650015 + ... + 669650018.

Almost surely, 2^2678600066 is an apocalyptic number.

2678600066 is a deficient number, since it is larger than the sum of its proper divisors (1339300036).

2678600066 is a wasteful number, since it uses less digits than its factorization.

2678600066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339300035.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 2678600066 is about 51755.1936137814. The cubic root of 2678600066 is about 1388.7880100038.

The spelling of 2678600066 in words is "two billion, six hundred seventy-eight million, six hundred thousand, sixty-six".