66603013 has 8 divisors (see below), whose sum is σ = 67480448. Its totient is φ = 65729664.

The previous prime is 66603007. The next prime is 66603029. The reversal of 66603013 is 31030666.

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-66603013 is a prime.

It is a super-2 number, since 2×66603013² = 8871922681356338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66603613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44170 + ... + 45652.

It is an arithmetic number, because the mean of its divisors is an integer number (8435056).

Almost surely, 2^66603013 is an apocalyptic number.

It is an amenable number.

66603013 is a deficient number, since it is larger than the sum of its proper divisors (877435).

66603013 is a wasteful number, since it uses less digits than its factorization.

66603013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 66603013 is about 8161.0669032915. The cubic root of 66603013 is about 405.3510404573.

Adding to 66603013 its reverse (31030666), we get a palindrome (97633679).

The spelling of 66603013 in words is "sixty-six million, six hundred three thousand, thirteen".