669960811 has 8 divisors (see below), whose sum is σ = 730190160. Its totient is φ = 610973472.

The previous prime is 669960799. The next prime is 669960827. The reversal of 669960811 is 118069966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 669960811 - 2⁹ = 669960299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669967811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309376 + ... + 311533.

It is an arithmetic number, because the mean of its divisors is an integer number (91273770).

Almost surely, 2^669960811 is an apocalyptic number.

669960811 is a deficient number, since it is larger than the sum of its proper divisors (60229349).

669960811 is a wasteful number, since it uses less digits than its factorization.

669960811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621005.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 669960811 is about 25883.6011984422. The cubic root of 669960811 is about 875.0169513995.

The spelling of 669960811 in words is "six hundred sixty-nine million, nine hundred sixty thousand, eight hundred eleven".