664743870417711 has 32 divisors (see below), whose sum is σ = 1083735436096000. Its totient is φ = 353961977086080.

The previous prime is 664743870417709. The next prime is 664743870417721. The reversal of 664743870417711 is 117714078347466.

It is a happy number.

It is not a de Polignac number, because 664743870417711 - 2¹ = 664743870417709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664743870417721) 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, 13655916136 + ... + 13655964813.

It is an arithmetic number, because the mean of its divisors is an integer number (33866732378000).

Almost surely, 2^{664743870417711} is an apocalyptic number.

664743870417711 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

664743870417711 is a deficient number, since it is larger than the sum of its proper divisors (418991565678289).

664743870417711 is a wasteful number, since it uses less digits than its factorization.

664743870417711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27311881039.

The product of its (nonzero) digits is 132765696, while the sum is 66.

The spelling of 664743870417711 in words is "six hundred sixty-four trillion, seven hundred forty-three billion, eight hundred seventy million, four hundred seventeen thousand, seven hundred eleven".