664561001510 has 64 divisors (see below), whose sum is σ = 1377533399040. Its totient is φ = 226111184640.

The previous prime is 664561001479. The next prime is 664561001537. The reversal of 664561001510 is 15100165466.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34121075 + ... + 34140545.

It is an arithmetic number, because the mean of its divisors is an integer number (21523959360).

Almost surely, 2^664561001510 is an apocalyptic number.

664561001510 is an abundant number, since it is smaller than the sum of its proper divisors (712972397530).

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

664561001510 is a wasteful number, since it uses less digits than its factorization.

664561001510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23181.

The product of its (nonzero) digits is 21600, while the sum is 35.

Adding to 664561001510 its reverse (15100165466), we get a palindrome (679661166976).

The spelling of 664561001510 in words is "six hundred sixty-four billion, five hundred sixty-one million, one thousand, five hundred ten".