66677461 has 4 divisors (see below), whose sum is σ = 66782124. Its totient is φ = 66572800.

The previous prime is 66677459. The next prime is 66677491. The reversal of 66677461 is 16477666.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54671236 + 12006225 = 7394^2 + 3465^2 .

It is a cyclic number.

It is not a de Polignac number, because 66677461 - 2¹ = 66677459 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 (66677411) 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, 51370 + ... + 52651.

It is an arithmetic number, because the mean of its divisors is an integer number (16695531).

Almost surely, 2^66677461 is an apocalyptic number.

It is an amenable number.

66677461 is a deficient number, since it is larger than the sum of its proper divisors (104663).

66677461 is a wasteful number, since it uses less digits than its factorization.

66677461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104662.

The product of its digits is 254016, while the sum is 43.

The square root of 66677461 is about 8165.6267977419. The cubic root of 66677461 is about 405.5020162958.

The spelling of 66677461 in words is "sixty-six million, six hundred seventy-seven thousand, four hundred sixty-one".