660060847 has 4 divisors (see below), whose sum is σ = 666865696. Its totient is φ = 653256000.

The previous prime is 660060829. The next prime is 660060857. The reversal of 660060847 is 748060066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660060847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660060857) 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, 3402279 + ... + 3402472.

It is an arithmetic number, because the mean of its divisors is an integer number (166716424).

Almost surely, 2^660060847 is an apocalyptic number.

660060847 is a deficient number, since it is larger than the sum of its proper divisors (6804849).

660060847 is an equidigital number, since it uses as much as digits as its factorization.

660060847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6804848.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 660060847 is about 25691.6493631686. The cubic root of 660060847 is about 870.6855243427.

The spelling of 660060847 in words is "six hundred sixty million, sixty thousand, eight hundred forty-seven".