618714664 has 8 divisors (see below), whose sum is σ = 1160090010. Its totient is φ = 309357328.

The previous prime is 618714617. The next prime is 618714673. The reversal of 618714664 is 466417816.

It can be written as a sum of positive squares in only one way, i.e., 598193764 + 20520900 = 24458^2 + 4530^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 618714664.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38669659 + ... + 38669674.

Almost surely, 2^618714664 is an apocalyptic number.

It is an amenable number.

618714664 is a deficient number, since it is larger than the sum of its proper divisors (541375346).

618714664 is a wasteful number, since it uses less digits than its factorization.

618714664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77339339 (or 77339335 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 618714664 is about 24873.9756371996. The cubic root of 618714664 is about 852.1122388081.

The spelling of 618714664 in words is "six hundred eighteen million, seven hundred fourteen thousand, six hundred sixty-four".