6660755015 has 8 divisors (see below), whose sum is σ = 8250741888. Its totient is φ = 5156713440.

The previous prime is 6660755009. The next prime is 6660755041. The reversal of 6660755015 is 5105570666.

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

It is not a de Polignac number, because 6660755015 - 2³² = 2365787719 is a prime.

It is a super-3 number, since 3×6660755015³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21486152 + ... + 21486461.

It is an arithmetic number, because the mean of its divisors is an integer number (1031342736).

Almost surely, 2^6660755015 is an apocalyptic number.

6660755015 is a deficient number, since it is larger than the sum of its proper divisors (1589986873).

6660755015 is a wasteful number, since it uses less digits than its factorization.

6660755015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42972649.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 6660755015 is about 81613.4487385504. The cubic root of 6660755015 is about 1881.5155855253.

The spelling of 6660755015 in words is "six billion, six hundred sixty million, seven hundred fifty-five thousand, fifteen".