1668370005 has 24 divisors (see below), whose sum is σ = 2893599072. Its totient is φ = 889256544.

The previous prime is 1668370003. The next prime is 1668370007. The reversal of 1668370005 is 5000738661.

It is an interprime number because it is at equal distance from previous prime (1668370003) and next prime (1668370007).

It is not a de Polignac number, because 1668370005 - 2¹ = 1668370003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668370003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70042 + ... + 90788.

It is an arithmetic number, because the mean of its divisors is an integer number (120566628).

Almost surely, 2^1668370005 is an apocalyptic number.

1668370005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1668370005 is a deficient number, since it is larger than the sum of its proper divisors (1225229067).

1668370005 is a wasteful number, since it uses less digits than its factorization.

1668370005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22545 (or 22542 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1668370005 is about 40845.6852678468. The cubic root of 1668370005 is about 1186.0348701579.

The spelling of 1668370005 in words is "one billion, six hundred sixty-eight million, three hundred seventy thousand, five".