6661674015 has 16 divisors (see below), whose sum is σ = 10885459968. Its totient is φ = 3477298976.

The previous prime is 6661673989. The next prime is 6661674029. The reversal of 6661674015 is 5104761666.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6661674015 - 2⁵ = 6661673983 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4723887 + ... + 4725296.

It is an arithmetic number, because the mean of its divisors is an integer number (680341248).

Almost surely, 2^6661674015 is an apocalyptic number.

6661674015 is a deficient number, since it is larger than the sum of its proper divisors (4223785953).

6661674015 is a wasteful number, since it uses less digits than its factorization.

6661674015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9449238.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 6661674015 is about 81619.0787438819. The cubic root of 6661674015 is about 1881.6021139194.

The spelling of 6661674015 in words is "six billion, six hundred sixty-one million, six hundred seventy-four thousand, fifteen".