66152817420 has 24 divisors (see below), whose sum is σ = 185227888944. Its totient is φ = 17640751296.

The previous prime is 66152817413. The next prime is 66152817421. The reversal of 66152817420 is 2471825166.

It is a happy number.

66152817420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66152817421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551273419 + ... + 551273538.

It is an arithmetic number, because the mean of its divisors is an integer number (7717828706).

Almost surely, 2^66152817420 is an apocalyptic number.

66152817420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66152817420 is an abundant number, since it is smaller than the sum of its proper divisors (119075071524).

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

66152817420 is a wasteful number, since it uses less digits than its factorization.

66152817420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102546969 (or 1102546967 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 66152817420 in words is "sixty-six billion, one hundred fifty-two million, eight hundred seventeen thousand, four hundred twenty".