405464520666 has 16 divisors (see below), whose sum is σ = 812622009600. Its totient is φ = 134872678848.

The previous prime is 405464520661. The next prime is 405464520679. The reversal of 405464520666 is 666025464504.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (405464520661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70537231 + ... + 70542978.

It is an arithmetic number, because the mean of its divisors is an integer number (50788875600).

Almost surely, 2^405464520666 is an apocalyptic number.

405464520666 is an abundant number, since it is smaller than the sum of its proper divisors (407157488934).

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

405464520666 is a wasteful number, since it uses less digits than its factorization.

405464520666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141080693.

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 405464520666 in words is "four hundred five billion, four hundred sixty-four million, five hundred twenty thousand, six hundred sixty-six".