664801770633 has 32 divisors (see below), whose sum is σ = 1190134643712. Its totient is φ = 318786062400.

The previous prime is 664801770631. The next prime is 664801770707. The reversal of 664801770633 is 336077108466.

664801770633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664801770633 - 2¹ = 664801770631 is a prime.

It is a super-2 number, since 2×664801770633² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664801770631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110686603 + ... + 110692608.

It is an arithmetic number, because the mean of its divisors is an integer number (37191707616).

Almost surely, 2^664801770633 is an apocalyptic number.

It is an amenable number.

664801770633 is a deficient number, since it is larger than the sum of its proper divisors (525332873079).

664801770633 is a wasteful number, since it uses less digits than its factorization.

664801770633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221379245.

The product of its (nonzero) digits is 3048192, while the sum is 51.

The spelling of 664801770633 in words is "six hundred sixty-four billion, eight hundred one million, seven hundred seventy thousand, six hundred thirty-three".