66370730 has 8 divisors (see below), whose sum is σ = 119467332. Its totient is φ = 26548288.

The previous prime is 66370727. The next prime is 66370739. The reversal of 66370730 is 3707366.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 64947481 + 1423249 = 8059^2 + 1193^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66370739) 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, 3318527 + ... + 3318546.

Almost surely, 2^66370730 is an apocalyptic number.

66370730 is a deficient number, since it is larger than the sum of its proper divisors (53096602).

66370730 is a wasteful number, since it uses less digits than its factorization.

66370730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6637080.

The product of its (nonzero) digits is 15876, while the sum is 32.

The square root of 66370730 is about 8146.8233072775. The cubic root of 66370730 is about 404.8792608638.

It can be divided in two parts, 6 and 6370730, that added together give a palindrome (6370736).

The spelling of 66370730 in words is "sixty-six million, three hundred seventy thousand, seven hundred thirty".