664307742212026 has 16 divisors (see below), whose sum is σ = 1087504055413920. Its totient is φ = 301831669446480.

The previous prime is 664307742212021. The next prime is 664307742212053. The reversal of 664307742212026 is 620212247703466.

It is not an unprimeable number, because it can be changed into a prime (664307742212021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6319706016 + ... + 6319811131.

It is an arithmetic number, because the mean of its divisors is an integer number (67969003463370).

Almost surely, 2^{664307742212026} is an apocalyptic number.

664307742212026 is a deficient number, since it is larger than the sum of its proper divisors (423196313201894).

664307742212026 is a wasteful number, since it uses less digits than its factorization.

664307742212026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12639519549.

The product of its (nonzero) digits is 8128512, while the sum is 52.

The spelling of 664307742212026 in words is "six hundred sixty-four trillion, three hundred seven billion, seven hundred forty-two million, two hundred twelve thousand, twenty-six".