264646666020 has 96 divisors (see below), whose sum is σ = 816379191936. Its totient is φ = 63521536000.

The previous prime is 264646666007. The next prime is 264646666027. The reversal of 264646666020 is 20666646462.

It is not an unprimeable number, because it can be changed into a prime (264646666027) 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, 1918389 + ... + 2051708.

It is an arithmetic number, because the mean of its divisors is an integer number (8503949916).

Almost surely, 2^264646666020 is an apocalyptic number.

264646666020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

264646666020 is an abundant number, since it is smaller than the sum of its proper divisors (551732525916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

264646666020 is a wasteful number, since it uses less digits than its factorization.

264646666020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3970221 (or 3970219 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 48.

The spelling of 264646666020 in words is "two hundred sixty-four billion, six hundred forty-six million, six hundred sixty-six thousand, twenty".