660649435 has 8 divisors (see below), whose sum is σ = 820116720. Its totient is φ = 510294624.

The previous prime is 660649433. The next prime is 660649439. The reversal of 660649435 is 534946066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660649435 - 2¹ = 660649433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660649391 and 660649400.

It is not an unprimeable number, because it can be changed into a prime (660649433) 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 7 ways as a sum of consecutive naturals, for example, 2277957 + ... + 2278246.

It is an arithmetic number, because the mean of its divisors is an integer number (102514590).

Almost surely, 2^660649435 is an apocalyptic number.

660649435 is a deficient number, since it is larger than the sum of its proper divisors (159467285).

660649435 is a wasteful number, since it uses less digits than its factorization.

660649435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556237.

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 660649435 is about 25703.1016610836. The cubic root of 660649435 is about 870.9442493787.

The spelling of 660649435 in words is "six hundred sixty million, six hundred forty-nine thousand, four hundred thirty-five".