66725975 has 12 divisors (see below), whose sum is σ = 83546736. Its totient is φ = 52860480.

The previous prime is 66725963. The next prime is 66726001. The reversal of 66725975 is 57952766.

It is not a de Polignac number, because 66725975 - 2¹⁶ = 66660439 is a prime.

It is a super-3 number, since 3×66725975³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10382 + ... + 15531.

It is an arithmetic number, because the mean of its divisors is an integer number (6962228).

Almost surely, 2^66725975 is an apocalyptic number.

66725975 is a deficient number, since it is larger than the sum of its proper divisors (16820761).

66725975 is a wasteful number, since it uses less digits than its factorization.

66725975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26026 (or 26021 counting only the distinct ones).

The product of its digits is 793800, while the sum is 47.

The square root of 66725975 is about 8168.5968807378. The cubic root of 66725975 is about 405.6003391536.

The spelling of 66725975 in words is "sixty-six million, seven hundred twenty-five thousand, nine hundred seventy-five".