66730402 has 8 divisors (see below), whose sum is σ = 100412316. Its totient is φ = 33259632.

The previous prime is 66730399. The next prime is 66730403. The reversal of 66730402 is 20403766.

It can be written as a sum of positive squares in 2 ways, for example, as 49266361 + 17464041 = 7019^2 + 4179^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66730403) 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, 51993 + ... + 53260.

Almost surely, 2^66730402 is an apocalyptic number.

66730402 is a deficient number, since it is larger than the sum of its proper divisors (33681914).

66730402 is a wasteful number, since it uses less digits than its factorization.

66730402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105572.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 66730402 is about 8168.8678530137. The cubic root of 66730402 is about 405.6093089388.

The spelling of 66730402 in words is "sixty-six million, seven hundred thirty thousand, four hundred two".