5006651666 has 4 divisors (see below), whose sum is σ = 7509977502. Its totient is φ = 2503325832.

The previous prime is 5006651627. The next prime is 5006651687. The reversal of 5006651666 is 6661566005.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6661566005 = 5 ⋅1332313201.

It can be written as a sum of positive squares in only one way, i.e., 5002591441 + 4060225 = 70729^2 + 2015^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1251662915 + ... + 1251662918.

Almost surely, 2^5006651666 is an apocalyptic number.

5006651666 is a deficient number, since it is larger than the sum of its proper divisors (2503325836).

5006651666 is a wasteful number, since it uses less digits than its factorization.

5006651666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503325835.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 5006651666 is about 70757.6968675493. The cubic root of 5006651666 is about 1710.7338899280.

The spelling of 5006651666 in words is "five billion, six million, six hundred fifty-one thousand, six hundred sixty-six".