1668015007 has 16 divisors (see below), whose sum is σ = 1733179392. Its totient is φ = 1604332800.

The previous prime is 1668014989. The next prime is 1668015017. The reversal of 1668015007 is 7005108661.

It is a cyclic number.

It is not a de Polignac number, because 1668015007 - 2¹¹ = 1668012959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668015017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687198 + ... + 689620.

It is an arithmetic number, because the mean of its divisors is an integer number (108323712).

Almost surely, 2^1668015007 is an apocalyptic number.

1668015007 is a deficient number, since it is larger than the sum of its proper divisors (65164385).

1668015007 is a wasteful number, since it uses less digits than its factorization.

1668015007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1668015007 is about 40841.3394368990. The cubic root of 1668015007 is about 1185.9507421622.

The spelling of 1668015007 in words is "one billion, six hundred sixty-eight million, fifteen thousand, seven".