70664321531 has 2 divisors, whose sum is σ = 70664321532. Its totient is φ = 70664321530.

The previous prime is 70664321527. The next prime is 70664321537. The reversal of 70664321531 is 13512346607.

It is a weak prime.

It is an emirp because it is prime and its reverse (13512346607) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70664321531 - 2² = 70664321527 is a prime.

It is a super-2 number, since 2×70664321531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70664321537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35332160765 + 35332160766.

It is an arithmetic number, because the mean of its divisors is an integer number (35332160766).

Almost surely, 2^70664321531 is an apocalyptic number.

70664321531 is a deficient number, since it is larger than the sum of its proper divisors (1).

70664321531 is an equidigital number, since it uses as much as digits as its factorization.

70664321531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 70664321531 in words is "seventy billion, six hundred sixty-four million, three hundred twenty-one thousand, five hundred thirty-one".