66347830 has 8 divisors (see below), whose sum is σ = 119426112. Its totient is φ = 26539128.

The previous prime is 66347819. The next prime is 66347833. The reversal of 66347830 is 3874366.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66347830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66347833) 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, 3317382 + ... + 3317401.

It is an arithmetic number, because the mean of its divisors is an integer number (14928264).

Almost surely, 2^66347830 is an apocalyptic number.

66347830 is a deficient number, since it is larger than the sum of its proper divisors (53078282).

66347830 is a wasteful number, since it uses less digits than its factorization.

66347830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6634790.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 66347830 is about 8145.4177302334. The cubic root of 66347830 is about 404.8326901259.

The spelling of 66347830 in words is "sixty-six million, three hundred forty-seven thousand, eight hundred thirty".