660648953 has 4 divisors (see below), whose sum is σ = 660851088. Its totient is φ = 660446820.

The previous prime is 660648929. The next prime is 660648959. The reversal of 660648953 is 359846066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 660648953 - 2⁶ = 660648889 is a prime.

It is a super-3 number, since 3×660648953³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 660648898 and 660648907.

It is not an unprimeable number, because it can be changed into a prime (660648959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96083 + ... + 102728.

It is an arithmetic number, because the mean of its divisors is an integer number (165212772).

Almost surely, 2^660648953 is an apocalyptic number.

It is an amenable number.

660648953 is a deficient number, since it is larger than the sum of its proper divisors (202135).

660648953 is a wasteful number, since it uses less digits than its factorization.

660648953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202134.

The product of its (nonzero) digits is 933120, while the sum is 47.

The square root of 660648953 is about 25703.0922847816. The cubic root of 660648953 is about 870.9440375693.

The spelling of 660648953 in words is "six hundred sixty million, six hundred forty-eight thousand, nine hundred fifty-three".