664105656435 has 32 divisors (see below), whose sum is σ = 1144425155328. Its totient is φ = 326910030720.

The previous prime is 664105656397. The next prime is 664105656449. The reversal of 664105656435 is 534656501466.

It is not a de Polignac number, because 664105656435 - 2⁹ = 664105655923 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1737880 + ... + 2085290.

It is an arithmetic number, because the mean of its divisors is an integer number (35763286104).

Almost surely, 2^664105656435 is an apocalyptic number.

664105656435 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

664105656435 is a deficient number, since it is larger than the sum of its proper divisors (480319498893).

664105656435 is a wasteful number, since it uses less digits than its factorization.

664105656435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357235.

The product of its (nonzero) digits is 7776000, while the sum is 51.

The spelling of 664105656435 in words is "six hundred sixty-four billion, one hundred five million, six hundred fifty-six thousand, four hundred thirty-five".