66975099 has 8 divisors (see below), whose sum is σ = 91478352. Its totient is φ = 43560960.

The previous prime is 66975079. The next prime is 66975109. The reversal of 66975099 is 99057966.

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

It is not a de Polignac number, because 66975099 - 2⁵ = 66975067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66975079) 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, 272134 + ... + 272379.

It is an arithmetic number, because the mean of its divisors is an integer number (11434794).

Almost surely, 2^66975099 is an apocalyptic number.

66975099 is a deficient number, since it is larger than the sum of its proper divisors (24503253).

66975099 is a wasteful number, since it uses less digits than its factorization.

66975099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544557.

The product of its (nonzero) digits is 918540, while the sum is 51.

The square root of 66975099 is about 8183.8315598502. The cubic root of 66975099 is about 406.1044870887.

The spelling of 66975099 in words is "sixty-six million, nine hundred seventy-five thousand, ninety-nine".