66530785 has 16 divisors (see below), whose sum is σ = 82851840. Its totient is φ = 51226560.

The previous prime is 66530759. The next prime is 66530831. The reversal of 66530785 is 58703566.

It is not a de Polignac number, because 66530785 - 2¹³ = 66522593 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66640 + ... + 67630.

It is an arithmetic number, because the mean of its divisors is an integer number (5178240).

Almost surely, 2^66530785 is an apocalyptic number.

It is an amenable number.

66530785 is a deficient number, since it is larger than the sum of its proper divisors (16321055).

66530785 is a wasteful number, since it uses less digits than its factorization.

66530785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 66530785 is about 8156.6405462053. The cubic root of 66530785 is about 405.2044590767.

The spelling of 66530785 in words is "sixty-six million, five hundred thirty thousand, seven hundred eighty-five".