1264668664 has 16 divisors (see below), whose sum is σ = 2710004400. Its totient is φ = 542000832.

The previous prime is 1264668661. The next prime is 1264668677. The reversal of 1264668664 is 4668664621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264668661) 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 3 ways as a sum of consecutive naturals, for example, 11291629 + ... + 11291740.

It is an arithmetic number, because the mean of its divisors is an integer number (169375275).

Almost surely, 2^1264668664 is an apocalyptic number.

1264668664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1264668664 is an abundant number, since it is smaller than the sum of its proper divisors (1445335736).

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

1264668664 is a wasteful number, since it uses less digits than its factorization.

1264668664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22583382 (or 22583378 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 49.

The square root of 1264668664 is about 35562.1802481231. The cubic root of 1264668664 is about 1081.4146596594.

The spelling of 1264668664 in words is "one billion, two hundred sixty-four million, six hundred sixty-eight thousand, six hundred sixty-four".