664356424010701 has 4 divisors (see below), whose sum is σ = 664356902583772. Its totient is φ = 664355945437632.

The previous prime is 664356424010651. The next prime is 664356424010761. The reversal of 664356424010701 is 107010424653466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 406524390002500 + 257832034008201 = 20162450^2 + 16057149^2 .

It is a cyclic number.

It is not a de Polignac number, because 664356424010701 - 2⁴⁵ = 629172051921869 is a prime.

It is a super-2 number, since 2×664356424010701² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664356424010761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237198156 + ... + 239982661.

It is an arithmetic number, because the mean of its divisors is an integer number (166089225645943).

Almost surely, 2^{664356424010701} is an apocalyptic number.

It is an amenable number.

664356424010701 is a deficient number, since it is larger than the sum of its proper divisors (478573071).

664356424010701 is a wasteful number, since it uses less digits than its factorization.

664356424010701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478573070.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 664356424010701 in words is "six hundred sixty-four trillion, three hundred fifty-six billion, four hundred twenty-four million, ten thousand, seven hundred one".