660551045 has 16 divisors (see below), whose sum is σ = 988253568. Its totient is φ = 411771840.

The previous prime is 660551033. The next prime is 660551083. The reversal of 660551045 is 540155066.

It is not a de Polignac number, because 660551045 - 2⁴ = 660551029 is a prime.

It is a Duffinian number.

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 in 15 ways as a sum of consecutive naturals, for example, 857474 + ... + 858243.

It is an arithmetic number, because the mean of its divisors is an integer number (61765848).

Almost surely, 2^660551045 is an apocalyptic number.

It is an amenable number.

660551045 is a deficient number, since it is larger than the sum of its proper divisors (327702523).

660551045 is a wasteful number, since it uses less digits than its factorization.

660551045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715740.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 660551045 is about 25701.1876184740. The cubic root of 660551045 is about 870.9010108851.

The spelling of 660551045 in words is "six hundred sixty million, five hundred fifty-one thousand, forty-five".