666661364 has 12 divisors (see below), whose sum is σ = 1166902464. Its totient is φ = 333260664.

The previous prime is 666661363. The next prime is 666661381. The reversal of 666661364 is 463166666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666661363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8069 + ... + 37395.

It is an arithmetic number, because the mean of its divisors is an integer number (97241872).

Almost surely, 2^666661364 is an apocalyptic number.

It is an amenable number.

666661364 is a deficient number, since it is larger than the sum of its proper divisors (500241100).

666661364 is a wasteful number, since it uses less digits than its factorization.

666661364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35014 (or 35012 counting only the distinct ones).

The product of its digits is 559872, while the sum is 44.

The square root of 666661364 is about 25819.7862888135. The cubic root of 666661364 is about 873.5781485772.

The spelling of 666661364 in words is "six hundred sixty-six million, six hundred sixty-one thousand, three hundred sixty-four".