65670725169 has 27 divisors (see below), whose sum is σ = 110353731033. Its totient is φ = 37523053512.

The previous prime is 65670725117. The next prime is 65670725171. The reversal of 65670725169 is 96152707656.

The square root of 65670725169 is 256263.

It is a perfect power (a square), and thus also a powerful number.

65670725169 is a `hidden beast` number, since 6 + 56 + 7 + 0 + 72 + 516 + 9 = 666.

It is not a de Polignac number, because 65670725169 - 2¹⁵ = 65670692401 is a prime.

It is a super-2 number, since 2×65670725169² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65670745169) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5375422 + ... + 5387624.

Almost surely, 2^65670725169 is an apocalyptic number.

65670725169 is the 256263-rd square number.

65670725169 is the 128132-nd centered octagonal number.

It is an amenable number.

65670725169 is a deficient number, since it is larger than the sum of its proper divisors (44683005864).

65670725169 is an frugal number, since it uses more digits than its factorization.

65670725169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24426 (or 12213 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 54.

The spelling of 65670725169 in words is "sixty-five billion, six hundred seventy million, seven hundred twenty-five thousand, one hundred sixty-nine".