2660459678 has 4 divisors (see below), whose sum is σ = 3990689520. Its totient is φ = 1330229838.

The previous prime is 2660459653. The next prime is 2660459687. The reversal of 2660459678 is 8769540662.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 665114918 + ... + 665114921.

It is an arithmetic number, because the mean of its divisors is an integer number (997672380).

Almost surely, 2^2660459678 is an apocalyptic number.

2660459678 is a deficient number, since it is larger than the sum of its proper divisors (1330229842).

2660459678 is a wasteful number, since it uses less digits than its factorization.

2660459678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330229841.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The square root of 2660459678 is about 51579.6440274649. The cubic root of 2660459678 is about 1385.6457914482.

The spelling of 2660459678 in words is "two billion, six hundred sixty million, four hundred fifty-nine thousand, six hundred seventy-eight".