780084664 has 8 divisors (see below), whose sum is σ = 1462658760. Its totient is φ = 390042328.

The previous prime is 780084637. The next prime is 780084751. The reversal of 780084664 is 466480087.

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 780084664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48755284 + ... + 48755299.

It is an arithmetic number, because the mean of its divisors is an integer number (182832345).

Almost surely, 2^780084664 is an apocalyptic number.

It is an amenable number.

780084664 is a deficient number, since it is larger than the sum of its proper divisors (682574096).

780084664 is a wasteful number, since it uses less digits than its factorization.

780084664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97510589 (or 97510585 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 780084664 is about 27929.9957751518. The cubic root of 780084664 is about 920.5497124318.

The spelling of 780084664 in words is "seven hundred eighty million, eighty-four thousand, six hundred sixty-four".