66724204254 has 32 divisors (see below), whose sum is σ = 135658650624. Its totient is φ = 21873149280.

The previous prime is 66724204249. The next prime is 66724204273. The reversal of 66724204254 is 45240242766.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3013227 + ... + 3035289.

It is an arithmetic number, because the mean of its divisors is an integer number (4239332832).

Almost surely, 2^66724204254 is an apocalyptic number.

66724204254 is an abundant number, since it is smaller than the sum of its proper divisors (68934446370).

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

66724204254 is a wasteful number, since it uses less digits than its factorization.

66724204254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30392.

The product of its (nonzero) digits is 645120, while the sum is 42.

The spelling of 66724204254 in words is "sixty-six billion, seven hundred twenty-four million, two hundred four thousand, two hundred fifty-four".