66354461 has 4 divisors (see below), whose sum is σ = 67897632. Its totient is φ = 64811292.

The previous prime is 66354437. The next prime is 66354467. The reversal of 66354461 is 16445366.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66354461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66354467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771521 + ... + 771606.

It is an arithmetic number, because the mean of its divisors is an integer number (16974408).

Almost surely, 2^66354461 is an apocalyptic number.

It is an amenable number.

66354461 is a deficient number, since it is larger than the sum of its proper divisors (1543171).

66354461 is a wasteful number, since it uses less digits than its factorization.

66354461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543170.

The product of its digits is 51840, while the sum is 35.

The square root of 66354461 is about 8145.8247587338. The cubic root of 66354461 is about 404.8461764054.

The spelling of 66354461 in words is "sixty-six million, three hundred fifty-four thousand, four hundred sixty-one".