66161469 has 24 divisors (see below), whose sum is σ = 98015680. Its totient is φ = 39663360.

The previous prime is 66161461. The next prime is 66161483. The reversal of 66161469 is 96416166.

It is not a de Polignac number, because 66161469 - 2³ = 66161461 is a prime.

It is a super-2 number, since 2×66161469² = 8754679960475922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66161461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34272 + ... + 36150.

Almost surely, 2^66161469 is an apocalyptic number.

It is an amenable number.

66161469 is a deficient number, since it is larger than the sum of its proper divisors (31854211).

66161469 is a wasteful number, since it uses less digits than its factorization.

66161469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001 (or 1990 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 66161469 is about 8133.9700638741. The cubic root of 66161469 is about 404.4532967919.

The spelling of 66161469 in words is "sixty-six million, one hundred sixty-one thousand, four hundred sixty-nine".