66414723 has 16 divisors (see below), whose sum is σ = 89671296. Its totient is φ = 43721280.

The previous prime is 66414721. The next prime is 66414739. The reversal of 66414723 is 32741466.

It is a happy number.

It is not a de Polignac number, because 66414723 - 2¹ = 66414721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66414721) 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, 116028 + ... + 116598.

It is an arithmetic number, because the mean of its divisors is an integer number (5604456).

Almost surely, 2^66414723 is an apocalyptic number.

66414723 is a deficient number, since it is larger than the sum of its proper divisors (23256573).

66414723 is a wasteful number, since it uses less digits than its factorization.

66414723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994.

The product of its digits is 24192, while the sum is 33.

The square root of 66414723 is about 8149.5228694691. The cubic root of 66414723 is about 404.9686974740.

The spelling of 66414723 in words is "sixty-six million, four hundred fourteen thousand, seven hundred twenty-three".