66554552 has 8 divisors (see below), whose sum is σ = 124789800. Its totient is φ = 33277272.

The previous prime is 66554503. The next prime is 66554557. The reversal of 66554552 is 25545566.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66554557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4159652 + ... + 4159667.

It is an arithmetic number, because the mean of its divisors is an integer number (15598725).

Almost surely, 2^66554552 is an apocalyptic number.

It is an amenable number.

66554552 is a deficient number, since it is larger than the sum of its proper divisors (58235248).

66554552 is a wasteful number, since it uses less digits than its factorization.

66554552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8319325 (or 8319321 counting only the distinct ones).

The product of its digits is 180000, while the sum is 38.

The square root of 66554552 is about 8158.0973271958. The cubic root of 66554552 is about 405.2527041502.

The spelling of 66554552 in words is "sixty-six million, five hundred fifty-four thousand, five hundred fifty-two".