1641666610 has 16 divisors (see below), whose sum is σ = 2992406400. Its totient is φ = 648354096.

The previous prime is 1641666569. The next prime is 1641666617. The reversal of 1641666610 is 166661461.

It is a self number, because there is not a number n which added to its sum of digits gives 1641666610.

It is not an unprimeable number, because it can be changed into a prime (1641666617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1038240 + ... + 1039819.

It is an arithmetic number, because the mean of its divisors is an integer number (187025400).

Almost surely, 2^1641666610 is an apocalyptic number.

1641666610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1641666610 is a deficient number, since it is larger than the sum of its proper divisors (1350739790).

1641666610 is a wasteful number, since it uses less digits than its factorization.

1641666610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078145.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 1641666610 is about 40517.4852378575. The cubic root of 1641666610 is about 1179.6730421344.

The spelling of 1641666610 in words is "one billion, six hundred forty-one million, six hundred sixty-six thousand, six hundred ten".