66554430 has 32 divisors (see below), whose sum is σ = 159957504. Its totient is φ = 17722656.

The previous prime is 66554429. The next prime is 66554431. The reversal of 66554430 is 3445566.

It is an interprime number because it is at equal distance from previous prime (66554429) and next prime (66554431).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66554391 and 66554400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66554431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30847 + ... + 32933.

It is an arithmetic number, because the mean of its divisors is an integer number (4998672).

Almost surely, 2^66554430 is an apocalyptic number.

66554430 is an abundant number, since it is smaller than the sum of its proper divisors (93403074).

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

66554430 is a wasteful number, since it uses less digits than its factorization.

66554430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160.

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 66554430 is about 8158.0898499588. The cubic root of 66554430 is about 405.2524565295.

Adding to 66554430 its reverse (3445566), we get a palindrome (69999996).

The spelling of 66554430 in words is "sixty-six million, five hundred fifty-four thousand, four hundred thirty".