664026409934 has 16 divisors (see below), whose sum is σ = 1000450651200. Its totient is φ = 330543038304.

The previous prime is 664026409933. The next prime is 664026409939. The reversal of 664026409934 is 439904620466.

It is a happy number.

It is a super-2 number, since 2×664026409934² (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 (664026409931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9765947 + ... + 9833705.

It is an arithmetic number, because the mean of its divisors is an integer number (62528165700).

Almost surely, 2^664026409934 is an apocalyptic number.

664026409934 is a deficient number, since it is larger than the sum of its proper divisors (336424241266).

664026409934 is a wasteful number, since it uses less digits than its factorization.

664026409934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89387.

The product of its (nonzero) digits is 6718464, while the sum is 53.

The spelling of 664026409934 in words is "six hundred sixty-four billion, twenty-six million, four hundred nine thousand, nine hundred thirty-four".