6660166501651 has 8 divisors (see below), whose sum is σ = 7181961896144. Its totient is φ = 6139724663520.

The previous prime is 6660166501633. The next prime is 6660166501663. The reversal of 6660166501651 is 1561056610666.

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

It is a cyclic number.

It is not a de Polignac number, because 6660166501651 - 2²³ = 6660158113043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6660166501595 and 6660166501604.

It is not an unprimeable number, because it can be changed into a prime (6660166531651) 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, 338378865 + ... + 338398546.

It is an arithmetic number, because the mean of its divisors is an integer number (897745237018).

Almost surely, 2^{6660166501651} is an apocalyptic number.

6660166501651 is a deficient number, since it is larger than the sum of its proper divisors (521795394493).

6660166501651 is a wasteful number, since it uses less digits than its factorization.

6660166501651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676778181.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 6660166501651 in words is "six trillion, six hundred sixty billion, one hundred sixty-six million, five hundred one thousand, six hundred fifty-one".