505406166078 has 32 divisors (see below), whose sum is σ = 1102786773120. Its totient is φ = 153141937760.

The previous prime is 505406166077. The next prime is 505406166079. The reversal of 505406166078 is 870661604505.

505406166078 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (505406166077) and next prime (505406166079).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505406166077) 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, 625501 + ... + 1184087.

It is an arithmetic number, because the mean of its divisors is an integer number (34462086660).

Almost surely, 2^505406166078 is an apocalyptic number.

505406166078 is an abundant number, since it is smaller than the sum of its proper divisors (597380607042).

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

505406166078 is a wasteful number, since it uses less digits than its factorization.

505406166078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572312.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 505406166078 in words is "five hundred five billion, four hundred six million, one hundred sixty-six thousand, seventy-eight".