664151651 has 2 divisors, whose sum is σ = 664151652. Its totient is φ = 664151650.

The previous prime is 664151647. The next prime is 664151681. The reversal of 664151651 is 156151466.

664151651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664151651 - 2² = 664151647 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (664151681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332075825 + 332075826.

It is an arithmetic number, because the mean of its divisors is an integer number (332075826).

Almost surely, 2^664151651 is an apocalyptic number.

664151651 is a deficient number, since it is larger than the sum of its proper divisors (1).

664151651 is an equidigital number, since it uses as much as digits as its factorization.

664151651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 35.

The square root of 664151651 is about 25771.1398855386. The cubic root of 664151651 is about 872.4805461409.

The spelling of 664151651 in words is "six hundred sixty-four million, one hundred fifty-one thousand, six hundred fifty-one".