664577070551603 has 32 divisors (see below), whose sum is σ = 734066693422272. Its totient is φ = 596642128588800.

The previous prime is 664577070551591. The next prime is 664577070551651. The reversal of 664577070551603 is 306155070775466.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 664577070551603 - 2⁴ = 664577070551587 is a prime.

It is a super-2 number, since 2×664577070551603² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664577070541603) 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, 416275775 + ... + 417869207.

It is an arithmetic number, because the mean of its divisors is an integer number (22939584169446).

Almost surely, 2^{664577070551603} is an apocalyptic number.

664577070551603 is a deficient number, since it is larger than the sum of its proper divisors (69489622870669).

664577070551603 is a wasteful number, since it uses less digits than its factorization.

664577070551603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594775.

The product of its (nonzero) digits is 111132000, while the sum is 62.

The spelling of 664577070551603 in words is "six hundred sixty-four trillion, five hundred seventy-seven billion, seventy million, five hundred fifty-one thousand, six hundred three".