664577070551651 has 2 divisors, whose sum is σ = 664577070551652. Its totient is φ = 664577070551650.

The previous prime is 664577070551591. The next prime is 664577070551687. The reversal of 664577070551651 is 156155070775466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664577070551651 - 2⁶ = 664577070551587 is a prime.

It is a super-2 number, since 2×664577070551651² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (664577270551651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332288535275825 + 332288535275826.

It is an arithmetic number, because the mean of its divisors is an integer number (332288535275826).

Almost surely, 2^{664577070551651} is an apocalyptic number.

664577070551651 is a deficient number, since it is larger than the sum of its proper divisors (1).

664577070551651 is an equidigital number, since it uses as much as digits as its factorization.

664577070551651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 185220000, while the sum is 65.

The spelling of 664577070551651 in words is "six hundred sixty-four trillion, five hundred seventy-seven billion, seventy million, five hundred fifty-one thousand, six hundred fifty-one".