663929326081 has 16 divisors (see below), whose sum is σ = 768014843904. Its totient is φ = 562155151824.

The previous prime is 663929326009. The next prime is 663929326153. The reversal of 663929326081 is 180623929366.

It is an interprime number because it is at equal distance from previous prime (663929326009) and next prime (663929326153).

It is not a de Polignac number, because 663929326081 - 2¹³ = 663929317889 is a prime.

It is a super-2 number, since 2×663929326081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (663929326001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4840066 + ... + 4975348.

It is an arithmetic number, because the mean of its divisors is an integer number (48000927744).

Almost surely, 2^663929326081 is an apocalyptic number.

It is an amenable number.

663929326081 is a deficient number, since it is larger than the sum of its proper divisors (104085517823).

663929326081 is a wasteful number, since it uses less digits than its factorization.

663929326081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143820.

The product of its (nonzero) digits is 5038848, while the sum is 55.

The spelling of 663929326081 in words is "six hundred sixty-three billion, nine hundred twenty-nine million, three hundred twenty-six thousand, eighty-one".