660472835 has 16 divisors (see below), whose sum is σ = 873186912. Its totient is φ = 475584000.

The previous prime is 660472783. The next prime is 660472837. The reversal of 660472835 is 538274066.

It is a happy number.

It is not a de Polignac number, because 660472835 - 2¹⁶ = 660407299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660472792 and 660472801.

It is not an unprimeable number, because it can be changed into a prime (660472837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53894 + ... + 65003.

It is an arithmetic number, because the mean of its divisors is an integer number (54574182).

Almost surely, 2^660472835 is an apocalyptic number.

660472835 is a deficient number, since it is larger than the sum of its proper divisors (212714077).

660472835 is a wasteful number, since it uses less digits than its factorization.

660472835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119014.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 660472835 is about 25699.6660484139. Note that the first 3 decimals coincide. The cubic root of 660472835 is about 870.8666376362.

The spelling of 660472835 in words is "six hundred sixty million, four hundred seventy-two thousand, eight hundred thirty-five".