66532554 has 48 divisors (see below), whose sum is σ = 162695520. Its totient is φ = 19464480.

The previous prime is 66532519. The next prime is 66532597. The reversal of 66532554 is 45523566.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52 + ... + 11535.

It is an arithmetic number, because the mean of its divisors is an integer number (3389490).

Almost surely, 2^66532554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66532554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81347760).

66532554 is an abundant number, since it is smaller than the sum of its proper divisors (96162966).

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

66532554 is a wasteful number, since it uses less digits than its factorization.

66532554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11635 (or 11632 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 66532554 is about 8156.7489847365. The cubic root of 66532554 is about 405.2080503983.

The spelling of 66532554 in words is "sixty-six million, five hundred thirty-two thousand, five hundred fifty-four".