66053402 has 4 divisors (see below), whose sum is σ = 99080106. Its totient is φ = 33026700.

The previous prime is 66053389. The next prime is 66053417. The reversal of 66053402 is 20435066.

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

It can be written as a sum of positive squares in only one way, i.e., 51681721 + 14371681 = 7189^2 + 3791^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16513349 + ... + 16513352.

Almost surely, 2^66053402 is an apocalyptic number.

66053402 is a deficient number, since it is larger than the sum of its proper divisors (33026704).

66053402 is a wasteful number, since it uses less digits than its factorization.

66053402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33026703.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 66053402 is about 8127.3244059777. The cubic root of 66053402 is about 404.2329677795.

Adding to 66053402 its reverse (20435066), we get a palindrome (86488468).

The spelling of 66053402 in words is "sixty-six million, fifty-three thousand, four hundred two".