1668669051 has 64 divisors (see below), whose sum is σ = 2795544576. Its totient is φ = 863654400.

The previous prime is 1668668999. The next prime is 1668669061. The reversal of 1668669051 is 1509668661.

It is not a de Polignac number, because 1668669051 - 2¹¹ = 1668667003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1668669061) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1089156 + ... + 1090686.

It is an arithmetic number, because the mean of its divisors is an integer number (43680384).

Almost surely, 2^1668669051 is an apocalyptic number.

1668669051 is a deficient number, since it is larger than the sum of its proper divisors (1126875525).

1668669051 is a wasteful number, since it uses less digits than its factorization.

1668669051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 1668669051 is about 40849.3457842350. The cubic root of 1668669051 is about 1186.1057292985.

The spelling of 1668669051 in words is "one billion, six hundred sixty-eight million, six hundred sixty-nine thousand, fifty-one".