665414077854 has 32 divisors (see below), whose sum is σ = 1345296672000. Its totient is φ = 219401142912.

The previous prime is 665414077793. The next prime is 665414077901. The reversal of 665414077854 is 458770414566.

It is a junction number, because it is equal to n+sod(n) for n = 665414077794 and 665414077803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 645082 + ... + 1321725.

It is an arithmetic number, because the mean of its divisors is an integer number (42040521000).

Almost surely, 2^665414077854 is an apocalyptic number.

665414077854 is an abundant number, since it is smaller than the sum of its proper divisors (679882594146).

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

665414077854 is a wasteful number, since it uses less digits than its factorization.

665414077854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967424.

The product of its (nonzero) digits is 22579200, while the sum is 57.

The spelling of 665414077854 in words is "six hundred sixty-five billion, four hundred fourteen million, seventy-seven thousand, eight hundred fifty-four".