66730475 has 48 divisors (see below), whose sum is σ = 100707840. Its totient is φ = 42873600.

The previous prime is 66730463. The next prime is 66730481. The reversal of 66730475 is 57403766.

It is not a de Polignac number, because 66730475 - 2¹² = 66726379 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 237335 + ... + 237615.

It is an arithmetic number, because the mean of its divisors is an integer number (2098080).

Almost surely, 2^66730475 is an apocalyptic number.

66730475 is a deficient number, since it is larger than the sum of its proper divisors (33977365).

66730475 is a wasteful number, since it uses less digits than its factorization.

66730475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 66730475 is about 8168.8723211959. The cubic root of 66730475 is about 405.6094568448.

The spelling of 66730475 in words is "sixty-six million, seven hundred thirty thousand, four hundred seventy-five".