664246022240 has 96 divisors (see below), whose sum is σ = 1705161507840. Its totient is φ = 243594432000.

The previous prime is 664246022171. The next prime is 664246022249. The reversal of 664246022240 is 42220642466.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 664246022194 and 664246022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664246022249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3429986 + ... + 3618465.

It is an arithmetic number, because the mean of its divisors is an integer number (17762099040).

Almost surely, 2^664246022240 is an apocalyptic number.

It is an amenable number.

664246022240 is an abundant number, since it is smaller than the sum of its proper divisors (1040915485600).

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

664246022240 is a wasteful number, since it uses less digits than its factorization.

664246022240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7048516 (or 7048508 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 664246022240 in words is "six hundred sixty-four billion, two hundred forty-six million, twenty-two thousand, two hundred forty".