66476108438 has 4 divisors (see below), whose sum is σ = 99714162660. Its totient is φ = 33238054218.

The previous prime is 66476108417. The next prime is 66476108467. The reversal of 66476108438 is 83480167466.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66476108438.

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, 16619027108 + ... + 16619027111.

It is an arithmetic number, because the mean of its divisors is an integer number (24928540665).

Almost surely, 2^66476108438 is an apocalyptic number.

66476108438 is a deficient number, since it is larger than the sum of its proper divisors (33238054222).

66476108438 is a wasteful number, since it uses less digits than its factorization.

66476108438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33238054221.

The product of its (nonzero) digits is 4644864, while the sum is 53.

The spelling of 66476108438 in words is "sixty-six billion, four hundred seventy-six million, one hundred eight thousand, four hundred thirty-eight".