66465654 has 16 divisors (see below), whose sum is σ = 133316400. Its totient is φ = 22091040.

The previous prime is 66465617. The next prime is 66465673. The reversal of 66465654 is 45656466.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13777 + ... + 17964.

It is an arithmetic number, because the mean of its divisors is an integer number (8332275).

Almost surely, 2^66465654 is an apocalyptic number.

66465654 is an abundant number, since it is smaller than the sum of its proper divisors (66850746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66465654 is a wasteful number, since it uses less digits than its factorization.

66465654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32095.

The product of its digits is 518400, while the sum is 42.

The square root of 66465654 is about 8152.6470547915. The cubic root of 66465654 is about 405.0721895399.

The spelling of 66465654 in words is "sixty-six million, four hundred sixty-five thousand, six hundred fifty-four".