66485739 has 12 divisors (see below), whose sum is σ = 89756456. Its totient is φ = 43776192.

The previous prime is 66485729. The next prime is 66485747. The reversal of 66485739 is 93758466.

It is not a de Polignac number, because 66485739 - 2¹⁷ = 66354667 is a prime.

It is a super-2 number, since 2×66485739² = 8840706980752242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66485729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19059 + ... + 22275.

Almost surely, 2^66485739 is an apocalyptic number.

66485739 is a deficient number, since it is larger than the sum of its proper divisors (23270717).

66485739 is an equidigital number, since it uses as much as digits as its factorization.

66485739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386 (or 3303 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The square root of 66485739 is about 8153.8787702541. The cubic root of 66485739 is about 405.1129878323.

The spelling of 66485739 in words is "sixty-six million, four hundred eighty-five thousand, seven hundred thirty-nine".