3144720666 has 16 divisors (see below), whose sum is σ = 6620464800. Its totient is φ = 993069648.

The previous prime is 3144720637. The next prime is 3144720679. The reversal of 3144720666 is 6660274413.

It is a happy number.

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, 13792521 + ... + 13792748.

It is an arithmetic number, because the mean of its divisors is an integer number (413779050).

Almost surely, 2^3144720666 is an apocalyptic number.

3144720666 is an abundant number, since it is smaller than the sum of its proper divisors (3475744134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3144720666 is a wasteful number, since it uses less digits than its factorization.

3144720666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27585293.

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 3144720666 is about 56077.8090335206. The cubic root of 3144720666 is about 1465.0778132750.

The spelling of 3144720666 in words is "three billion, one hundred forty-four million, seven hundred twenty thousand, six hundred sixty-six".