79668625 has 8 divisors (see below), whose sum is σ = 99426600. Its totient is φ = 63734800.

The previous prime is 79668607. The next prime is 79668643. The reversal of 79668625 is 52686697.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (79668607) and next prime (79668643).

It can be written as a sum of positive squares in 4 ways, for example, as 10246401 + 69422224 = 3201^2 + 8332^2 .

It is not a de Polignac number, because 79668625 - 2¹¹ = 79666577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318550 + ... + 318799.

It is an arithmetic number, because the mean of its divisors is an integer number (12428325).

Almost surely, 2^79668625 is an apocalyptic number.

It is an amenable number.

79668625 is a deficient number, since it is larger than the sum of its proper divisors (19757975).

79668625 is an equidigital number, since it uses as much as digits as its factorization.

79668625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637364 (or 637354 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The square root of 79668625 is about 8925.7282616042. The cubic root of 79668625 is about 430.2911764995.

The spelling of 79668625 in words is "seventy-nine million, six hundred sixty-eight thousand, six hundred twenty-five".