66572541 has 12 divisors (see below), whose sum is σ = 109897632. Its totient is φ = 38041416.

The previous prime is 66572537. The next prime is 66572543. The reversal of 66572541 is 14527566.

It is a happy number.

66572541 is a `hidden beast` number, since 66 + 57 + 2 + 541 = 666.

It is not a de Polignac number, because 66572541 - 2² = 66572537 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66572496 and 66572505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66572543) 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 11 ways as a sum of consecutive naturals, for example, 528291 + ... + 528416.

It is an arithmetic number, because the mean of its divisors is an integer number (9158136).

Almost surely, 2^66572541 is an apocalyptic number.

It is an amenable number.

66572541 is a deficient number, since it is larger than the sum of its proper divisors (43325091).

66572541 is a wasteful number, since it uses less digits than its factorization.

66572541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056720 (or 1056717 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 66572541 is about 8159.1997769389. The cubic root of 66572541 is about 405.2892127183.

The spelling of 66572541 in words is "sixty-six million, five hundred seventy-two thousand, five hundred forty-one".