66397016 has 16 divisors (see below), whose sum is σ = 142279440. Its totient is φ = 28455840.

The previous prime is 66396989. The next prime is 66397033. The reversal of 66397016 is 61079366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592775 + ... + 592886.

It is an arithmetic number, because the mean of its divisors is an integer number (8892465).

Almost surely, 2^66397016 is an apocalyptic number.

It is an amenable number.

66397016 is an abundant number, since it is smaller than the sum of its proper divisors (75882424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66397016 is a wasteful number, since it uses less digits than its factorization.

66397016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185674 (or 1185670 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 66397016 is about 8148.4364144295. The cubic root of 66397016 is about 404.9327043600.

It can be divided in two parts, 663 and 97016, that added together give a palindrome (97679).

The spelling of 66397016 in words is "sixty-six million, three hundred ninety-seven thousand, sixteen".