1668515201 has 12 divisors (see below), whose sum is σ = 1829621760. Its totient is φ = 1519702080.

The previous prime is 1668515171. The next prime is 1668515209. The reversal of 1668515201 is 1025158661.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1668515201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668515209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84161 + ... + 102078.

It is an arithmetic number, because the mean of its divisors is an integer number (152468480).

Almost surely, 2^1668515201 is an apocalyptic number.

It is an amenable number.

1668515201 is a deficient number, since it is larger than the sum of its proper divisors (161106559).

1668515201 is a wasteful number, since it uses less digits than its factorization.

1668515201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186304 (or 186287 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 1668515201 is about 40847.4626017333. The cubic root of 1668515201 is about 1186.0692755002.

The spelling of 1668515201 in words is "one billion, six hundred sixty-eight million, five hundred fifteen thousand, two hundred one".