668425037 has 4 divisors (see below), whose sum is σ = 763914336. Its totient is φ = 572935740.

The previous prime is 668425033. The next prime is 668425049. The reversal of 668425037 is 730524866.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 730524866 = 2 ⋅365262433.

It is a cyclic number.

It is not a de Polignac number, because 668425037 - 2² = 668425033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 668424985 and 668425003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668425033) 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 in 3 ways as a sum of consecutive naturals, for example, 47744639 + ... + 47744652.

It is an arithmetic number, because the mean of its divisors is an integer number (190978584).

Almost surely, 2^668425037 is an apocalyptic number.

It is an amenable number.

668425037 is a deficient number, since it is larger than the sum of its proper divisors (95489299).

668425037 is an equidigital number, since it uses as much as digits as its factorization.

668425037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95489298.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 668425037 is about 25853.9172467152. The cubic root of 668425037 is about 874.3478294620.

The spelling of 668425037 in words is "six hundred sixty-eight million, four hundred twenty-five thousand, thirty-seven".