66603359 has 4 divisors (see below), whose sum is σ = 66664104. Its totient is φ = 66542616.

The previous prime is 66603353. The next prime is 66603373. The reversal of 66603359 is 95330666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66603359 - 2¹² = 66599263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66603353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28697 + ... + 30930.

It is an arithmetic number, because the mean of its divisors is an integer number (16666026).

Almost surely, 2^66603359 is an apocalyptic number.

66603359 is a deficient number, since it is larger than the sum of its proper divisors (60745).

66603359 is a wasteful number, since it uses less digits than its factorization.

66603359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60744.

The product of its (nonzero) digits is 87480, while the sum is 38.

The square root of 66603359 is about 8161.0881014727. The cubic root of 66603359 is about 405.3517423836.

The spelling of 66603359 in words is "sixty-six million, six hundred three thousand, three hundred fifty-nine".