1664760531 has 8 divisors (see below), whose sum is σ = 2536777984. Its totient is φ = 951291720.

The previous prime is 1664760529. The next prime is 1664760533. The reversal of 1664760531 is 1350674661.

It is an interprime number because it is at equal distance from previous prime (1664760529) and next prime (1664760533).

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

It is not a de Polignac number, because 1664760531 - 2¹ = 1664760529 is a prime.

It is a super-2 number, since 2×1664760531² = 5542855251150803922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1664760531.

It is not an unprimeable number, because it can be changed into a prime (1664760533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39637135 + ... + 39637176.

It is an arithmetic number, because the mean of its divisors is an integer number (317097248).

Almost surely, 2^1664760531 is an apocalyptic number.

1664760531 is a deficient number, since it is larger than the sum of its proper divisors (872017453).

1664760531 is an equidigital number, since it uses as much as digits as its factorization.

1664760531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79274321.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 1664760531 is about 40801.4770688513. The cubic root of 1664760531 is about 1185.1789343284.

The spelling of 1664760531 in words is "one billion, six hundred sixty-four million, seven hundred sixty thousand, five hundred thirty-one".