1664464634 has 24 divisors (see below), whose sum is σ = 2905773588. Its totient is φ = 712985280.

The previous prime is 1664464631. The next prime is 1664464639. The reversal of 1664464634 is 4364644661.

It can be written as a sum of positive squares in 2 ways, for example, as 1631917609 + 32547025 = 40397^2 + 5705^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1664464631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313022 + ... + 318294.

Almost surely, 2^1664464634 is an apocalyptic number.

1664464634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1664464634 is a deficient number, since it is larger than the sum of its proper divisors (1241308954).

1664464634 is a wasteful number, since it uses less digits than its factorization.

1664464634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8510 (or 8503 counting only the distinct ones).

The product of its digits is 995328, while the sum is 44.

The square root of 1664464634 is about 40797.8508502593. The cubic root of 1664464634 is about 1185.1087116820.

The spelling of 1664464634 in words is "one billion, six hundred sixty-four million, four hundred sixty-four thousand, six hundred thirty-four".