1664012007 has 24 divisors (see below), whose sum is σ = 2754227840. Its totient is φ = 948341520.

The previous prime is 1664011957. The next prime is 1664012033. The reversal of 1664012007 is 7002104661.

1664012007 is a `hidden beast` number, since 1 + 6 + 640 + 12 + 0 + 0 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1664012007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664012807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10969 + ... + 58722.

Almost surely, 2^1664012007 is an apocalyptic number.

1664012007 is a deficient number, since it is larger than the sum of its proper divisors (1090215833).

1664012007 is a wasteful number, since it uses less digits than its factorization.

1664012007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70083 (or 70080 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1664012007 is about 40792.3032813790. The cubic root of 1664012007 is about 1185.0012775717.

Adding to 1664012007 its reverse (7002104661), we get a palindrome (8666116668).

The spelling of 1664012007 in words is "one billion, six hundred sixty-four million, twelve thousand, seven".