1668478476 has 48 divisors (see below), whose sum is σ = 4465400576. Its totient is φ = 474980544.

The previous prime is 1668478459. The next prime is 1668478517. The reversal of 1668478476 is 6748748661.

It is a happy number.

It is a super-3 number, since 3×1668478476³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12586 + ... + 59121.

Almost surely, 2^1668478476 is an apocalyptic number.

It is an amenable number.

1668478476 is an abundant number, since it is smaller than the sum of its proper divisors (2796922100).

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

1668478476 is a wasteful number, since it uses less digits than its factorization.

1668478476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71998 (or 71996 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 57.

The square root of 1668478476 is about 40847.0130609326. The cubic root of 1668478476 is about 1186.0605734091.

The spelling of 1668478476 in words is "one billion, six hundred sixty-eight million, four hundred seventy-eight thousand, four hundred seventy-six".