66425737 has 16 divisors (see below), whose sum is σ = 77051520. Its totient is φ = 56092032.

The previous prime is 66425731. The next prime is 66425741. The reversal of 66425737 is 73752466.

It is a cyclic number.

It is not a de Polignac number, because 66425737 - 2¹¹ = 66423689 is a prime.

It is a super-3 number, since 3×66425737³ (a number of 24 digits) contains 333 as substring.

Its product of digits (211680) is a multiple of the sum of its prime divisors (672).

It is a self number, because there is not a number n which added to its sum of digits gives 66425737.

It is not an unprimeable number, because it can be changed into a prime (66425731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226563 + ... + 226855.

It is an arithmetic number, because the mean of its divisors is an integer number (4815720).

Almost surely, 2^66425737 is an apocalyptic number.

It is an amenable number.

66425737 is a deficient number, since it is larger than the sum of its proper divisors (10625783).

66425737 is a wasteful number, since it uses less digits than its factorization.

66425737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672.

The product of its digits is 211680, while the sum is 40.

The square root of 66425737 is about 8150.1985865376. The cubic root of 66425737 is about 404.9910824638.

The spelling of 66425737 in words is "sixty-six million, four hundred twenty-five thousand, seven hundred thirty-seven".