664168466742 has 16 divisors (see below), whose sum is σ = 1449094836672. Its totient is φ = 201263171720.

The previous prime is 664168466701. The next prime is 664168466743. The reversal of 664168466742 is 247664861466.

It is a super-2 number, since 2×664168466742² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664168466743) 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, 5031579228 + ... + 5031579359.

It is an arithmetic number, because the mean of its divisors is an integer number (90568427292).

Almost surely, 2^664168466742 is an apocalyptic number.

664168466742 is an abundant number, since it is smaller than the sum of its proper divisors (784926369930).

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

664168466742 is a wasteful number, since it uses less digits than its factorization.

664168466742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10063158603.

The product of its digits is 55738368, while the sum is 60.

The spelling of 664168466742 in words is "six hundred sixty-four billion, one hundred sixty-eight million, four hundred sixty-six thousand, seven hundred forty-two".