660462725 has 12 divisors (see below), whose sum is σ = 881972196. Its totient is φ = 487726080.

The previous prime is 660462713. The next prime is 660462749. The reversal of 660462725 is 527264066.

It can be written as a sum of positive squares in 6 ways, for example, as 6791236 + 653671489 = 2606^2 + 25567^2 .

It is not a de Polignac number, because 660462725 - 2⁴ = 660462709 is a prime.

It is a super-3 number, since 3×660462725³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 11 ways as a sum of consecutive naturals, for example, 1015772 + ... + 1016421.

It is an arithmetic number, because the mean of its divisors is an integer number (73497683).

Almost surely, 2^660462725 is an apocalyptic number.

660462725 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

660462725 is a deficient number, since it is larger than the sum of its proper divisors (221509471).

660462725 is a wasteful number, since it uses less digits than its factorization.

660462725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032216 (or 2032211 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 660462725 is about 25699.4693524983. The cubic root of 660462725 is about 870.8621940991.

The spelling of 660462725 in words is "six hundred sixty million, four hundred sixty-two thousand, seven hundred twenty-five".