66021002 has 8 divisors (see below), whose sum is σ = 99094212. Its totient is φ = 32989600.

The previous prime is 66020993. The next prime is 66021019. The reversal of 66021002 is 20012066.

It can be written as a sum of positive squares in 2 ways, for example, as 61606801 + 4414201 = 7849^2 + 2101^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6149 + ... + 13032.

Almost surely, 2^66021002 is an apocalyptic number.

66021002 is a deficient number, since it is larger than the sum of its proper divisors (33073210).

66021002 is a wasteful number, since it uses less digits than its factorization.

66021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20904.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 66021002 is about 8125.3308855701. The cubic root of 66021002 is about 404.1668632349.

Adding to 66021002 its reverse (20012066), we get a palindrome (86033068).

The spelling of 66021002 in words is "sixty-six million, twenty-one thousand, two".