66425723 has 16 divisors (see below), whose sum is σ = 83428800. Its totient is φ = 52553088.

The previous prime is 66425719. The next prime is 66425731. The reversal of 66425723 is 32752466.

It is not a de Polignac number, because 66425723 - 2² = 66425719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66425713) 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, 2990 + ... + 11907.

It is an arithmetic number, because the mean of its divisors is an integer number (5214300).

Almost surely, 2^66425723 is an apocalyptic number.

66425723 is a deficient number, since it is larger than the sum of its proper divisors (17003077).

66425723 is a wasteful number, since it uses less digits than its factorization.

66425723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14931 (or 14917 counting only the distinct ones).

The product of its digits is 60480, while the sum is 35.

The square root of 66425723 is about 8150.1977276628. The cubic root of 66425723 is about 404.9910540116.

The spelling of 66425723 in words is "sixty-six million, four hundred twenty-five thousand, seven hundred twenty-three".