66465489 has 4 divisors (see below), whose sum is σ = 88620656. Its totient is φ = 44310324.

The previous prime is 66465481. The next prime is 66465493. The reversal of 66465489 is 98456466.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66465489 - 2³ = 66465481 is a prime.

It is a super-2 number, since 2×66465489² = 8835322456018242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66465481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11077579 + ... + 11077584.

It is an arithmetic number, because the mean of its divisors is an integer number (22155164).

Almost surely, 2^66465489 is an apocalyptic number.

It is an amenable number.

66465489 is a deficient number, since it is larger than the sum of its proper divisors (22155167).

66465489 is a wasteful number, since it uses less digits than its factorization.

66465489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22155166.

The product of its digits is 1244160, while the sum is 48.

The square root of 66465489 is about 8152.6369353725. The cubic root of 66465489 is about 405.0718543444.

The spelling of 66465489 in words is "sixty-six million, four hundred sixty-five thousand, four hundred eighty-nine".