66175490 has 16 divisors (see below), whose sum is σ = 119560320. Its totient is φ = 26371440.

The previous prime is 66175489. The next prime is 66175493. The reversal of 66175490 is 9457166.

It is not an unprimeable number, because it can be changed into a prime (66175493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9500 + ... + 14919.

It is an arithmetic number, because the mean of its divisors is an integer number (7472520).

Almost surely, 2^66175490 is an apocalyptic number.

66175490 is a deficient number, since it is larger than the sum of its proper divisors (53384830).

66175490 is a wasteful number, since it uses less digits than its factorization.

66175490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24697.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 66175490 is about 8134.8318974641. The cubic root of 66175490 is about 404.4818654800.

The spelling of 66175490 in words is "sixty-six million, one hundred seventy-five thousand, four hundred ninety".