66515054 has 8 divisors (see below), whose sum is σ = 101261928. Its totient is φ = 32761080.

The previous prime is 66515051. The next prime is 66515063. The reversal of 66515054 is 45051566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66515054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66515051) 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 3 ways as a sum of consecutive naturals, for example, 248057 + ... + 248324.

It is an arithmetic number, because the mean of its divisors is an integer number (12657741).

Almost surely, 2^66515054 is an apocalyptic number.

66515054 is a deficient number, since it is larger than the sum of its proper divisors (34746874).

66515054 is a wasteful number, since it uses less digits than its factorization.

66515054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496450.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 66515054 is about 8155.6761828802. The cubic root of 66515054 is about 405.1725201089.

The spelling of 66515054 in words is "sixty-six million, five hundred fifteen thousand, fifty-four".