660340415 has 12 divisors (see below), whose sum is σ = 921781656. Its totient is φ = 452804688.

The previous prime is 660340403. The next prime is 660340427. The reversal of 660340415 is 514043066.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (660340403) and next prime (660340427).

It is not a de Polignac number, because 660340415 - 2¹⁴ = 660324031 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 (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1347389 + ... + 1347878.

It is an arithmetic number, because the mean of its divisors is an integer number (76815138).

Almost surely, 2^660340415 is an apocalyptic number.

660340415 is a deficient number, since it is larger than the sum of its proper divisors (261441241).

660340415 is a wasteful number, since it uses less digits than its factorization.

660340415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2695286 (or 2695279 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 660340415 is about 25697.0896212003. The cubic root of 660340415 is about 870.8084329370.

The spelling of 660340415 in words is "six hundred sixty million, three hundred forty thousand, four hundred fifteen".