66554324 has 6 divisors (see below), whose sum is σ = 116470074. Its totient is φ = 33277160.

The previous prime is 66554309. The next prime is 66554339. The reversal of 66554324 is 42345566.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66554309) and next prime (66554339).

It can be written as a sum of positive squares in only one way, i.e., 50410000 + 16144324 = 7100^2 + 4018^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8319287 + ... + 8319294.

It is an arithmetic number, because the mean of its divisors is an integer number (19411679).

Almost surely, 2^66554324 is an apocalyptic number.

It is an amenable number.

66554324 is a deficient number, since it is larger than the sum of its proper divisors (49915750).

66554324 is a wasteful number, since it uses less digits than its factorization.

66554324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16638585 (or 16638583 counting only the distinct ones).

The product of its digits is 86400, while the sum is 35.

The square root of 66554324 is about 8158.0833533374. The cubic root of 66554324 is about 405.2522413833.

The spelling of 66554324 in words is "sixty-six million, five hundred fifty-four thousand, three hundred twenty-four".