66550115 has 8 divisors (see below), whose sum is σ = 79923888. Its totient is φ = 53197600.

The previous prime is 66550069. The next prime is 66550117. The reversal of 66550115 is 51105566.

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

It is a de Polignac number, because none of the positive numbers 2^k-66550115 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66550117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2669 + ... + 11841.

It is an arithmetic number, because the mean of its divisors is an integer number (9990486).

Almost surely, 2^66550115 is an apocalyptic number.

66550115 is a deficient number, since it is larger than the sum of its proper divisors (13373773).

66550115 is a wasteful number, since it uses less digits than its factorization.

66550115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10629.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 66550115 is about 8157.8253842553. The cubic root of 66550115 is about 405.2436982738.

The spelling of 66550115 in words is "sixty-six million, five hundred fifty thousand, one hundred fifteen".