66359963 has 8 divisors (see below), whose sum is σ = 67174800. Its totient is φ = 65549088.

The previous prime is 66359957. The next prime is 66359977. The reversal of 66359963 is 36995366.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66359963 - 2⁴ = 66359947 is a prime.

It is a super-2 number, since 2×66359963² = 8807289378722738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66359903) 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, 44945 + ... + 46397.

It is an arithmetic number, because the mean of its divisors is an integer number (8396850).

Almost surely, 2^66359963 is an apocalyptic number.

66359963 is a deficient number, since it is larger than the sum of its proper divisors (814837).

66359963 is a wasteful number, since it uses less digits than its factorization.

66359963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981.

The product of its digits is 787320, while the sum is 47.

The square root of 66359963 is about 8146.1624707589. The cubic root of 66359963 is about 404.8573658168.

The spelling of 66359963 in words is "sixty-six million, three hundred fifty-nine thousand, nine hundred sixty-three".