54870641666 has 4 divisors (see below), whose sum is σ = 82305962502. Its totient is φ = 27435320832.

The previous prime is 54870641659. The next prime is 54870641687. The reversal of 54870641666 is 66614607845.

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

It can be written as a sum of positive squares in only one way, i.e., 40957259641 + 13913382025 = 202379^2 + 117955^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13717660415 + ... + 13717660418.

Almost surely, 2^54870641666 is an apocalyptic number.

54870641666 is a deficient number, since it is larger than the sum of its proper divisors (27435320836).

54870641666 is a wasteful number, since it uses less digits than its factorization.

54870641666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27435320835.

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 54870641666 in words is "fifty-four billion, eight hundred seventy million, six hundred forty-one thousand, six hundred sixty-six".