66116451 has 16 divisors (see below), whose sum is σ = 95330304. Its totient is φ = 40600704.

The previous prime is 66116429. The next prime is 66116483. The reversal of 66116451 is 15461166.

It is not a de Polignac number, because 66116451 - 2⁹ = 66115939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66116051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11395 + ... + 16188.

It is an arithmetic number, because the mean of its divisors is an integer number (5958144).

Almost surely, 2^66116451 is an apocalyptic number.

66116451 is a deficient number, since it is larger than the sum of its proper divisors (29213853).

66116451 is a wasteful number, since it uses less digits than its factorization.

66116451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27650.

The product of its digits is 4320, while the sum is 30.

The square root of 66116451 is about 8131.2023096219. The cubic root of 66116451 is about 404.3615424319.

The spelling of 66116451 in words is "sixty-six million, one hundred sixteen thousand, four hundred fifty-one".