6660247051 has 4 divisors (see below), whose sum is σ = 6668001400. Its totient is φ = 6652492704.

The previous prime is 6660247003. The next prime is 6660247151. The reversal of 6660247051 is 1507420666.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1507420666 = 2 ⋅753710333.

It is a cyclic number.

It is not a de Polignac number, because 6660247051 - 2²³ = 6651858443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6660247051.

It is not an unprimeable number, because it can be changed into a prime (6660247151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3875886 + ... + 3877603.

It is an arithmetic number, because the mean of its divisors is an integer number (1667000350).

Almost surely, 2^6660247051 is an apocalyptic number.

6660247051 is a deficient number, since it is larger than the sum of its proper divisors (7754349).

6660247051 is an equidigital number, since it uses as much as digits as its factorization.

6660247051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7754348.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 6660247051 is about 81610.3366676060. The cubic root of 6660247051 is about 1881.4677547875.

The spelling of 6660247051 in words is "six billion, six hundred sixty million, two hundred forty-seven thousand, fifty-one".