66606475 has 48 divisors (see below), whose sum is σ = 94993920. Its totient is φ = 45964800.

The previous prime is 66606469. The next prime is 66606479. The reversal of 66606475 is 57460666.

It is not a de Polignac number, because 66606475 - 2¹¹ = 66604427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66606479) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 348630 + ... + 348820.

It is an arithmetic number, because the mean of its divisors is an integer number (1979040).

Almost surely, 2^66606475 is an apocalyptic number.

66606475 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66606475 is a deficient number, since it is larger than the sum of its proper divisors (28387445).

66606475 is a wasteful number, since it uses less digits than its factorization.

66606475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 66606475 is about 8161.2790051560. The cubic root of 66606475 is about 405.3580636680.

It can be divided in two parts, 66606 and 475, that added together give a square (67081 = 259²).

The spelling of 66606475 in words is "sixty-six million, six hundred six thousand, four hundred seventy-five".