66050055603 has 12 divisors (see below), whose sum is σ = 109035012528. Its totient is φ = 37742888880.

The previous prime is 66050055593. The next prime is 66050055611. The reversal of 66050055603 is 30655005066.

It is a happy number.

It is not a de Polignac number, because 66050055603 - 2¹⁴ = 66050039219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66050055403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 524206728 + ... + 524206853.

It is an arithmetic number, because the mean of its divisors is an integer number (9086251044).

Almost surely, 2^66050055603 is an apocalyptic number.

66050055603 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

66050055603 is a deficient number, since it is larger than the sum of its proper divisors (42984956925).

66050055603 is a wasteful number, since it uses less digits than its factorization.

66050055603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048413594 (or 1048413591 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The spelling of 66050055603 in words is "sixty-six billion, fifty million, fifty-five thousand, six hundred three".