6662666461 has 8 divisors (see below), whose sum is σ = 7376847264. Its totient is φ = 5966566320.

The previous prime is 6662666449. The next prime is 6662666533. The reversal of 6662666461 is 1646662666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6662666461 - 2⁵ = 6662666429 is a prime.

It is a super-2 number, since 2×6662666461² = 88782248741068529042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6662666861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4519390 + ... + 4520863.

It is an arithmetic number, because the mean of its divisors is an integer number (922105908).

Almost surely, 2^6662666461 is an apocalyptic number.

It is an amenable number.

6662666461 is a deficient number, since it is larger than the sum of its proper divisors (714180803).

6662666461 is a wasteful number, since it uses less digits than its factorization.

6662666461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9040331.

The product of its digits is 2239488, while the sum is 49.

The square root of 6662666461 is about 81625.1582601835. The cubic root of 6662666461 is about 1881.6955486808.

The spelling of 6662666461 in words is "six billion, six hundred sixty-two million, six hundred sixty-six thousand, four hundred sixty-one".