1321664450466 has 16 divisors (see below), whose sum is σ = 2643829689600. Its totient is φ = 440471352048.

The previous prime is 1321664450461. The next prime is 1321664450501. The reversal of 1321664450466 is 6640544661231.

It is not an unprimeable number, because it can be changed into a prime (1321664450461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20831881 + ... + 20895228.

It is an arithmetic number, because the mean of its divisors is an integer number (165239355600).

Almost surely, 2^{1321664450466} is an apocalyptic number.

1321664450466 is an abundant number, since it is smaller than the sum of its proper divisors (1322165239134).

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

1321664450466 is a wasteful number, since it uses less digits than its factorization.

1321664450466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41732393.

The product of its (nonzero) digits is 2488320, while the sum is 48.

The spelling of 1321664450466 in words is "one trillion, three hundred twenty-one billion, six hundred sixty-four million, four hundred fifty thousand, four hundred sixty-six".