1666722002 has 24 divisors (see below), whose sum is σ = 2867514048. Its totient is φ = 724659320.

The previous prime is 1666721999. The next prime is 1666722053. The reversal of 1666722002 is 2002276661.

It is a self number, because there is not a number n which added to its sum of digits gives 1666722002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144158 + ... + 155289.

It is an arithmetic number, because the mean of its divisors is an integer number (119479752).

Almost surely, 2^1666722002 is an apocalyptic number.

1666722002 is a deficient number, since it is larger than the sum of its proper divisors (1200792046).

1666722002 is a wasteful number, since it uses less digits than its factorization.

1666722002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299494 (or 299483 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 1666722002 is about 40825.5067574182. The cubic root of 1666722002 is about 1185.6442228099.

Adding to 1666722002 its reverse (2002276661), we get a palindrome (3668998663).

The spelling of 1666722002 in words is "one billion, six hundred sixty-six million, seven hundred twenty-two thousand, two".