66846454 has 4 divisors (see below), whose sum is σ = 100269684. Its totient is φ = 33423226.

The previous prime is 66846433. The next prime is 66846473. The reversal of 66846454 is 45464866.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66846454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16711612 + ... + 16711615.

It is an arithmetic number, because the mean of its divisors is an integer number (25067421).

Almost surely, 2^66846454 is an apocalyptic number.

66846454 is a deficient number, since it is larger than the sum of its proper divisors (33423230).

66846454 is a wasteful number, since it uses less digits than its factorization.

66846454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33423229.

The product of its digits is 552960, while the sum is 43.

The square root of 66846454 is about 8175.9680772371. The cubic root of 66846454 is about 405.8443068242.

The spelling of 66846454 in words is "sixty-six million, eight hundred forty-six thousand, four hundred fifty-four".