66369563 has 8 divisors (see below), whose sum is σ = 71744400. Its totient is φ = 61033248.

The previous prime is 66369557. The next prime is 66369607. The reversal of 66369563 is 36596366.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66369563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66369503) 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, 5993 + ... + 12986.

It is an arithmetic number, because the mean of its divisors is an integer number (8968050).

Almost surely, 2^66369563 is an apocalyptic number.

66369563 is a deficient number, since it is larger than the sum of its proper divisors (5374837).

66369563 is a wasteful number, since it uses less digits than its factorization.

66369563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19261.

The product of its digits is 524880, while the sum is 44.

The square root of 66369563 is about 8146.7516839535. The cubic root of 66369563 is about 404.8768878455.

The spelling of 66369563 in words is "sixty-six million, three hundred sixty-nine thousand, five hundred sixty-three".