664030051 has 2 divisors, whose sum is σ = 664030052. Its totient is φ = 664030050.

The previous prime is 664030049. The next prime is 664030091. The reversal of 664030051 is 150030466.

664030051 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 664030051 - 2¹ = 664030049 is a prime.

Together with 664030049, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 664029998 and 664030025.

It is not a weakly prime, because it can be changed into another prime (664030091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332015025 + 332015026.

It is an arithmetic number, because the mean of its divisors is an integer number (332015026).

Almost surely, 2^664030051 is an apocalyptic number.

664030051 is a deficient number, since it is larger than the sum of its proper divisors (1).

664030051 is an equidigital number, since it uses as much as digits as its factorization.

664030051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 664030051 is about 25768.7805493392. The cubic root of 664030051 is about 872.4272951954.

The spelling of 664030051 in words is "six hundred sixty-four million, thirty thousand, fifty-one".