664161862 has 16 divisors (see below), whose sum is σ = 1226145312. Its totient is φ = 262745280.

The previous prime is 664161859. The next prime is 664161863. The reversal of 664161862 is 268161466.

It is a happy number.

664161862 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×664161862² = 882221957870614088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664161863) 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, 1824439 + ... + 1824802.

It is an arithmetic number, because the mean of its divisors is an integer number (76634082).

Almost surely, 2^664161862 is an apocalyptic number.

664161862 is a deficient number, since it is larger than the sum of its proper divisors (561983450).

664161862 is a wasteful number, since it uses less digits than its factorization.

664161862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649263.

The product of its digits is 82944, while the sum is 40.

The square root of 664161862 is about 25771.3379939808. The cubic root of 664161862 is about 872.4850174355.

The spelling of 664161862 in words is "six hundred sixty-four million, one hundred sixty-one thousand, eight hundred sixty-two".