1668479215 has 32 divisors (see below), whose sum is σ = 2219083776. Its totient is φ = 1196451840.

The previous prime is 1668479201. The next prime is 1668479233. The reversal of 1668479215 is 5129748661.

It is a happy number.

It is not a de Polignac number, because 1668479215 - 2¹⁹ = 1667954927 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 619602 + ... + 622288.

It is an arithmetic number, because the mean of its divisors is an integer number (69346368).

Almost surely, 2^1668479215 is an apocalyptic number.

1668479215 is a deficient number, since it is larger than the sum of its proper divisors (550604561).

1668479215 is a wasteful number, since it uses less digits than its factorization.

1668479215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979.

The product of its digits is 725760, while the sum is 49.

The square root of 1668479215 is about 40847.0221068807. The cubic root of 1668479215 is about 1186.0607485185.

The spelling of 1668479215 in words is "one billion, six hundred sixty-eight million, four hundred seventy-nine thousand, two hundred fifteen".