66605497 has 8 divisors (see below), whose sum is σ = 76305600. Its totient is φ = 56951664.

The previous prime is 66605449. The next prime is 66605501. The reversal of 66605497 is 79450666.

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

It is not a de Polignac number, because 66605497 - 2⁷ = 66605369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66603497) 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, 8422 + ... + 14287.

It is an arithmetic number, because the mean of its divisors is an integer number (9538200).

Almost surely, 2^66605497 is an apocalyptic number.

It is an amenable number.

66605497 is a deficient number, since it is larger than the sum of its proper divisors (9700103).

66605497 is a wasteful number, since it uses less digits than its factorization.

66605497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23135.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 66605497 is about 8161.2190878569. The cubic root of 66605497 is about 405.3560796661.

The spelling of 66605497 in words is "sixty-six million, six hundred five thousand, four hundred ninety-seven".