66196441 has 4 divisors (see below), whose sum is σ = 67985572. Its totient is φ = 64407312.

The previous prime is 66196433. The next prime is 66196477. The reversal of 66196441 is 14469166.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38937600 + 27258841 = 6240^2 + 5221^2 .

It is a cyclic number.

It is not a de Polignac number, because 66196441 - 2³ = 66196433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1789093 = 66196441 / (6 + 6 + 1 + 9 + 6 + 4 + 4 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66196441.

It is not an unprimeable number, because it can be changed into a prime (66196411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 894510 + ... + 894583.

It is an arithmetic number, because the mean of its divisors is an integer number (16996393).

Almost surely, 2^66196441 is an apocalyptic number.

It is an amenable number.

66196441 is a deficient number, since it is larger than the sum of its proper divisors (1789131).

66196441 is a wasteful number, since it uses less digits than its factorization.

66196441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789130.

The product of its digits is 31104, while the sum is 37.

The square root of 66196441 is about 8136.1195296038. The cubic root of 66196441 is about 404.5245469694.

The spelling of 66196441 in words is "sixty-six million, one hundred ninety-six thousand, four hundred forty-one".