778413660 has 48 divisors (see below), whose sum is σ = 2294275200. Its totient is φ = 196651584.

The previous prime is 778413637. The next prime is 778413661. The reversal of 778413660 is 66314877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778413661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340270 + ... + 342549.

It is an arithmetic number, because the mean of its divisors is an integer number (47797400).

Almost surely, 2^778413660 is an apocalyptic number.

It is an amenable number.

778413660 is an abundant number, since it is smaller than the sum of its proper divisors (1515861540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

778413660 is a wasteful number, since it uses less digits than its factorization.

778413660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682850 (or 682848 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 778413660 is about 27900.0655913207. The cubic root of 778413660 is about 919.8919454065.

The spelling of 778413660 in words is "seven hundred seventy-eight million, four hundred thirteen thousand, six hundred sixty".