664581416315 has 16 divisors (see below), whose sum is σ = 798221796960.
Its totient is φ = 531182603520.
The previous prime is 664581416309. The next prime is 664581416333. The reversal of 664581416315 is 513614185466.
It is not a de Polignac number, because 664581416315 - 214 = 664581399931 is a prime.
It is a super-2 number, since 2×6645814163152 (a number of 24 digits) contains 22 as substring.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34270052 + ... + 34289438.
It is an arithmetic number, because the mean of its divisors is an integer number (49888862310).
Almost surely, 2664581416315 is an apocalyptic number.
664581416315 is a deficient number, since it is larger than the sum of its proper divisors (133640380645).
664581416315 is a wasteful number, since it uses less digits than its factorization.
664581416315 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 25262.
The product of its digits is 2073600, while the sum is 50.
The spelling of 664581416315 in words is "six hundred sixty-four billion, five hundred eighty-one million, four hundred sixteen thousand, three hundred fifteen".