66354563 has 8 divisors (see below), whose sum is σ = 75534336. Its totient is φ = 57699400.

The previous prime is 66354551. The next prime is 66354571. The reversal of 66354563 is 36545366.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-66354563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66354503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130883 + ... + 131388.

It is an arithmetic number, because the mean of its divisors is an integer number (9441792).

Almost surely, 2^66354563 is an apocalyptic number.

66354563 is a deficient number, since it is larger than the sum of its proper divisors (9179773).

66354563 is a wasteful number, since it uses less digits than its factorization.

66354563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262305.

The product of its digits is 194400, while the sum is 38.

The square root of 66354563 is about 8145.8310196075. The cubic root of 66354563 is about 404.8463838483.

The spelling of 66354563 in words is "sixty-six million, three hundred fifty-four thousand, five hundred sixty-three".