6660575666 has 8 divisors (see below), whose sum is σ = 10516698480. Its totient is φ = 3155009508.

The previous prime is 6660575651. The next prime is 6660575689. The reversal of 6660575666 is 6665750666.

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

It is a super-2 number, since 2×6660575666² = 88726536405022687112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87639116 + ... + 87639191.

It is an arithmetic number, because the mean of its divisors is an integer number (1314587310).

Almost surely, 2^6660575666 is an apocalyptic number.

6660575666 is a deficient number, since it is larger than the sum of its proper divisors (3856122814).

6660575666 is a wasteful number, since it uses less digits than its factorization.

6660575666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175278328.

The product of its (nonzero) digits is 8164800, while the sum is 53.

The square root of 6660575666 is about 81612.3499600397. The cubic root of 6660575666 is about 1881.4986980019.

The spelling of 6660575666 in words is "six billion, six hundred sixty million, five hundred seventy-five thousand, six hundred sixty-six".