66672375 has 64 divisors (see below), whose sum is σ = 138378240. Its totient is φ = 27696000.

The previous prime is 66672269. The next prime is 66672401. The reversal of 66672375 is 57327666.

It is not a de Polignac number, because 66672375 - 2⁸ = 66672119 is a prime.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 27721 + ... + 30029.

It is an arithmetic number, because the mean of its divisors is an integer number (2162160).

Almost surely, 2^66672375 is an apocalyptic number.

66672375 is an abundant number, since it is smaller than the sum of its proper divisors (71705865).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66672375 is a wasteful number, since it uses less digits than its factorization.

66672375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345 (or 2335 counting only the distinct ones).

The product of its digits is 317520, while the sum is 42.

The square root of 66672375 is about 8165.3153643935. The cubic root of 66672375 is about 405.4917057867.

The spelling of 66672375 in words is "sixty-six million, six hundred seventy-two thousand, three hundred seventy-five".