66473556 has 24 divisors (see below), whose sum is σ = 155354304. Its totient is φ = 22122240.

The previous prime is 66473551. The next prime is 66473567. The reversal of 66473556 is 65537466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66473551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3961 + ... + 12191.

It is an arithmetic number, because the mean of its divisors is an integer number (6473096).

Almost surely, 2^66473556 is an apocalyptic number.

It is an amenable number.

66473556 is an abundant number, since it is smaller than the sum of its proper divisors (88880748).

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

66473556 is a wasteful number, since it uses less digits than its factorization.

66473556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8911 (or 8909 counting only the distinct ones).

The product of its digits is 453600, while the sum is 42.

The square root of 66473556 is about 8153.1316682610. The cubic root of 66473556 is about 405.0882417083.

The spelling of 66473556 in words is "sixty-six million, four hundred seventy-three thousand, five hundred fifty-six".