66554712 has 192 divisors, whose sum is σ = 219098880. Its totient is φ = 17853696.

The previous prime is 66554689. The next prime is 66554717. The reversal of 66554712 is 21745566.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (50400) is a multiple of the sum of its prime divisors (175).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66554717) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 801823 + ... + 801905.

It is an arithmetic number, because the mean of its divisors is an integer number (1141140).

Almost surely, 2^66554712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66554712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109549440).

66554712 is an abundant number, since it is smaller than the sum of its proper divisors (152544168).

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

66554712 is a wasteful number, since it uses less digits than its factorization.

66554712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 175 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 66554712 is about 8158.1071333980. The cubic root of 66554712 is about 405.2530288982.

The spelling of 66554712 in words is "sixty-six million, five hundred fifty-four thousand, seven hundred twelve".