66550505254 has 16 divisors (see below), whose sum is σ = 101149830000. Its totient is φ = 32835394944.

The previous prime is 66550505239. The next prime is 66550505269. The reversal of 66550505254 is 45250505566.

It is an interprime number because it is at equal distance from previous prime (66550505239) and next prime (66550505269).

It is a self number, because there is not a number n which added to its sum of digits gives 66550505254.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285807 + ... + 463450.

It is an arithmetic number, because the mean of its divisors is an integer number (6321864375).

Almost surely, 2^66550505254 is an apocalyptic number.

66550505254 is a deficient number, since it is larger than the sum of its proper divisors (34599324746).

66550505254 is a wasteful number, since it uses less digits than its factorization.

66550505254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749847.

The product of its (nonzero) digits is 900000, while the sum is 43.

The spelling of 66550505254 in words is "sixty-six billion, five hundred fifty million, five hundred five thousand, two hundred fifty-four".