660081007 has 4 divisors (see below), whose sum is σ = 662231416. Its totient is φ = 657930600.

The previous prime is 660080983. The next prime is 660081013. The reversal of 660081007 is 700180066.

660081007 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 660081007 - 2¹⁹ = 659556719 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 (660081307) 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, 1074744 + ... + 1075357.

It is an arithmetic number, because the mean of its divisors is an integer number (165557854).

Almost surely, 2^660081007 is an apocalyptic number.

660081007 is a deficient number, since it is larger than the sum of its proper divisors (2150409).

660081007 is a wasteful number, since it uses less digits than its factorization.

660081007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150408.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 660081007 is about 25692.0417055554. The cubic root of 660081007 is about 870.6943885969.

The spelling of 660081007 in words is "six hundred sixty million, eighty-one thousand, seven".