664047012105400 has 192 divisors, whose sum is σ = 1924912672704000. Its totient is φ = 206971526899200.

The previous prime is 664047012105271. The next prime is 664047012105439. The reversal of 664047012105400 is 4501210740466.

It is a super-2 number, since 2×664047012105400² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 814545186 + ... + 815360014.

It is an arithmetic number, because the mean of its divisors is an integer number (10025586837000).

Almost surely, 2^{664047012105400} is an apocalyptic number.

It is an amenable number.

664047012105400 is an abundant number, since it is smaller than the sum of its proper divisors (1260865660598600).

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

664047012105400 is a wasteful number, since it uses less digits than its factorization.

664047012105400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867782 (or 867773 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

Adding to 664047012105400 its reverse (4501210740466), we get a palindrome (668548222845866).

The spelling of 664047012105400 in words is "six hundred sixty-four trillion, forty-seven billion, twelve million, one hundred five thousand, four hundred".