66416707 has 6 divisors (see below), whose sum is σ = 77260308. Its totient is φ = 56928564.

The previous prime is 66416689. The next prime is 66416729. The reversal of 66416707 is 70761466.

It is a de Polignac number, because none of the positive numbers 2^k-66416707 is a prime.

It is a super-2 number, since 2×66416707² = 8822357937447698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66416747) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 677673 + ... + 677770.

It is an arithmetic number, because the mean of its divisors is an integer number (12876718).

Almost surely, 2^66416707 is an apocalyptic number.

66416707 is a deficient number, since it is larger than the sum of its proper divisors (10843601).

66416707 is a wasteful number, since it uses less digits than its factorization.

66416707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355457 (or 1355450 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 66416707 is about 8149.6445934777. The cubic root of 66416707 is about 404.9727299629.

It can be divided in two parts, 664 and 16707, that added together give a palindrome (17371).

The spelling of 66416707 in words is "sixty-six million, four hundred sixteen thousand, seven hundred seven".