66913503 has 8 divisors (see below), whose sum is σ = 90549888. Its totient is φ = 43943064.

The previous prime is 66913489. The next prime is 66913519. The reversal of 66913503 is 30531966.

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

It is not a de Polignac number, because 66913503 - 2⁴ = 66913487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66913543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166251 + ... + 166652.

It is an arithmetic number, because the mean of its divisors is an integer number (11318736).

Almost surely, 2^66913503 is an apocalyptic number.

66913503 is a deficient number, since it is larger than the sum of its proper divisors (23636385).

66913503 is a wasteful number, since it uses less digits than its factorization.

66913503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332973.

The product of its (nonzero) digits is 14580, while the sum is 33.

The square root of 66913503 is about 8180.0674202601. The cubic root of 66913503 is about 405.9799528228.

The spelling of 66913503 in words is "sixty-six million, nine hundred thirteen thousand, five hundred three".