66313503 has 24 divisors (see below), whose sum is σ = 97901856. Its totient is φ = 43243200.

The previous prime is 66313501. The next prime is 66313537. The reversal of 66313503 is 30531366.

It is not a de Polignac number, because 66313503 - 2¹ = 66313501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66313501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99993 + ... + 100653.

It is an arithmetic number, because the mean of its divisors is an integer number (4079244).

Almost surely, 2^66313503 is an apocalyptic number.

66313503 is a deficient number, since it is larger than the sum of its proper divisors (31588353).

66313503 is a wasteful number, since it uses less digits than its factorization.

66313503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

The square root of 66313503 is about 8143.3103219759. The cubic root of 66313503 is about 404.7628607179.

Adding to 66313503 its reverse (30531366), we get a palindrome (96844869).

The spelling of 66313503 in words is "sixty-six million, three hundred thirteen thousand, five hundred three".