660125407 has 2 divisors, whose sum is σ = 660125408. Its totient is φ = 660125406.

The previous prime is 660125363. The next prime is 660125413. The reversal of 660125407 is 704521066.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660125407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660125437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330062703 + 330062704.

It is an arithmetic number, because the mean of its divisors is an integer number (330062704).

Almost surely, 2^660125407 is an apocalyptic number.

660125407 is a deficient number, since it is larger than the sum of its proper divisors (1).

660125407 is an equidigital number, since it uses as much as digits as its factorization.

660125407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 660125407 is about 25692.9057718274. The cubic root of 660125407 is about 870.7139104252.

The spelling of 660125407 in words is "six hundred sixty million, one hundred twenty-five thousand, four hundred seven".