66496655 has 4 divisors (see below), whose sum is σ = 79795992. Its totient is φ = 53197320.

The previous prime is 66496631. The next prime is 66496667. The reversal of 66496655 is 55669466.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55669466 = 2 ⋅27834733.

It is not a de Polignac number, because 66496655 - 2¹⁰ = 66495631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6649661 + ... + 6649670.

It is an arithmetic number, because the mean of its divisors is an integer number (19948998).

Almost surely, 2^66496655 is an apocalyptic number.

66496655 is a deficient number, since it is larger than the sum of its proper divisors (13299337).

66496655 is a wasteful number, since it uses less digits than its factorization.

66496655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13299336.

The product of its digits is 1166400, while the sum is 47.

The square root of 66496655 is about 8154.5481174618. The cubic root of 66496655 is about 405.1351578567.

The spelling of 66496655 in words is "sixty-six million, four hundred ninety-six thousand, six hundred fifty-five".