66302402 has 8 divisors (see below), whose sum is σ = 99841356. Its totient is φ = 33021952.

The previous prime is 66302351. The next prime is 66302407. The reversal of 66302402 is 20420366.

It can be written as a sum of positive squares in 2 ways, for example, as 59274601 + 7027801 = 7699^2 + 2651^2 .

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 (66302407) 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, 63983 + ... + 65010.

Almost surely, 2^66302402 is an apocalyptic number.

66302402 is a deficient number, since it is larger than the sum of its proper divisors (33538954).

66302402 is a wasteful number, since it uses less digits than its factorization.

66302402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129252.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 66302402 is about 8142.6286910309. The cubic root of 66302402 is about 404.7402734465.

Adding to 66302402 its reverse (20420366), we get a palindrome (86722768).

The spelling of 66302402 in words is "sixty-six million, three hundred two thousand, four hundred two".