66729800054 has 8 divisors (see below), whose sum is σ = 100333590840. Its totient is φ = 33285269776.

The previous prime is 66729800009. The next prime is 66729800083. The reversal of 66729800054 is 45000892766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 66729799981 and 66729800008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39814079 + ... + 39815754.

It is an arithmetic number, because the mean of its divisors is an integer number (12541698855).

Almost surely, 2^66729800054 is an apocalyptic number.

66729800054 is a deficient number, since it is larger than the sum of its proper divisors (33603790786).

66729800054 is a wasteful number, since it uses less digits than its factorization.

66729800054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79630254.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 66729800054 in words is "sixty-six billion, seven hundred twenty-nine million, eight hundred thousand, fifty-four".