66521002 has 8 divisors (see below), whose sum is σ = 101044800. Its totient is φ = 32839404.

The previous prime is 66520969. The next prime is 66521011. The reversal of 66521002 is 20012566.

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, 210352 + ... + 210667.

It is an arithmetic number, because the mean of its divisors is an integer number (12630600).

Almost surely, 2^66521002 is an apocalyptic number.

66521002 is a deficient number, since it is larger than the sum of its proper divisors (34523798).

66521002 is a wasteful number, since it uses less digits than its factorization.

66521002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421100.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 66521002 is about 8156.0408287355. The cubic root of 66521002 is about 405.1845970457.

Adding to 66521002 its reverse (20012566), we get a palindrome (86533568).

The spelling of 66521002 in words is "sixty-six million, five hundred twenty-one thousand, two".