66414551 has 6 divisors (see below), whose sum is σ = 77257800. Its totient is φ = 56926716.

The previous prime is 66414533. The next prime is 66414577. The reversal of 66414551 is 15541466.

It is a de Polignac number, because none of the positive numbers 2^k-66414551 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 (66411551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 677651 + ... + 677748.

It is an arithmetic number, because the mean of its divisors is an integer number (12876300).

Almost surely, 2^66414551 is an apocalyptic number.

66414551 is a deficient number, since it is larger than the sum of its proper divisors (10843249).

66414551 is a wasteful number, since it uses less digits than its factorization.

66414551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355413 (or 1355406 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 66414551 is about 8149.5123166972. The cubic root of 66414551 is about 404.9683478794.

The spelling of 66414551 in words is "sixty-six million, four hundred fourteen thousand, five hundred fifty-one".