1664317955 has 8 divisors (see below), whose sum is σ = 2008726992. Its totient is φ = 1323757408.

The previous prime is 1664317877. The next prime is 1664317957. The reversal of 1664317955 is 5597134661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1664317955 - 2¹⁴ = 1664301571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664317957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961169 + ... + 962898.

It is an arithmetic number, because the mean of its divisors is an integer number (251090874).

Almost surely, 2^1664317955 is an apocalyptic number.

1664317955 is a deficient number, since it is larger than the sum of its proper divisors (344409037).

1664317955 is a wasteful number, since it uses less digits than its factorization.

1664317955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924245.

The product of its digits is 680400, while the sum is 47.

The square root of 1664317955 is about 40796.0531791986. The cubic root of 1664317955 is about 1185.0738985528.

The spelling of 1664317955 in words is "one billion, six hundred sixty-four million, three hundred seventeen thousand, nine hundred fifty-five".