66275541 has 24 divisors (see below), whose sum is σ = 97919640. Its totient is φ = 43186176.

The previous prime is 66275533. The next prime is 66275563. The reversal of 66275541 is 14557266.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 324900 + 65950641 = 570^2 + 8121^2 .

It is not a de Polignac number, because 66275541 - 2³ = 66275533 is a prime.

It is a super-3 number, since 3×66275541³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66275496 and 66275505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66275441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77271 + ... + 78123.

It is an arithmetic number, because the mean of its divisors is an integer number (4079985).

Almost surely, 2^66275541 is an apocalyptic number.

It is an amenable number.

66275541 is a deficient number, since it is larger than the sum of its proper divisors (31644099).

66275541 is a wasteful number, since it uses less digits than its factorization.

66275541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045 (or 1042 counting only the distinct ones).

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

The square root of 66275541 is about 8140.9791180177. The cubic root of 66275541 is about 404.6856087756.

The spelling of 66275541 in words is "sixty-six million, two hundred seventy-five thousand, five hundred forty-one".