1666052210 has 16 divisors (see below), whose sum is σ = 3001090392. Its totient is φ = 665932800.

The previous prime is 1666052197. The next prime is 1666052257. The reversal of 1666052210 is 122506661.

It can be written as a sum of positive squares in 4 ways, for example, as 1520922001 + 145130209 = 38999^2 + 12047^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46511 + ... + 74130.

Almost surely, 2^1666052210 is an apocalyptic number.

1666052210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666052210 is a deficient number, since it is larger than the sum of its proper divisors (1335038182).

1666052210 is a wasteful number, since it uses less digits than its factorization.

1666052210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122029.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1666052210 is about 40817.3028261300. The cubic root of 1666052210 is about 1185.4853798004.

Adding to 1666052210 its reverse (122506661), we get a palindrome (1788558871).

The spelling of 1666052210 in words is "one billion, six hundred sixty-six million, fifty-two thousand, two hundred ten".