64673072669 has 2 divisors, whose sum is σ = 64673072670. Its totient is φ = 64673072668.

The previous prime is 64673072623. The next prime is 64673072687. The reversal of 64673072669 is 96627037646.

64673072669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61200327769 + 3472744900 = 247387^2 + 58930^2 .

It is a cyclic number.

It is not a de Polignac number, because 64673072669 - 2⁸ = 64673072413 is a prime.

It is a super-2 number, since 2×64673072669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64673072699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32336536334 + 32336536335.

It is an arithmetic number, because the mean of its divisors is an integer number (32336536335).

Almost surely, 2^64673072669 is an apocalyptic number.

It is an amenable number.

64673072669 is a deficient number, since it is larger than the sum of its proper divisors (1).

64673072669 is an equidigital number, since it uses as much as digits as its factorization.

64673072669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 56.

The spelling of 64673072669 in words is "sixty-four billion, six hundred seventy-three million, seventy-two thousand, six hundred sixty-nine".