66176916 has 48 divisors (see below), whose sum is σ = 167236608. Its totient is φ = 20246400.

The previous prime is 66176879. The next prime is 66176933. The reversal of 66176916 is 61967166.

It is a super-2 number, since 2×66176916² = 8758768422542112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28686 + ... + 30906.

It is an arithmetic number, because the mean of its divisors is an integer number (3484096).

Almost surely, 2^66176916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66176916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83618304).

66176916 is an abundant number, since it is smaller than the sum of its proper divisors (101059692).

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

66176916 is a wasteful number, since it uses less digits than its factorization.

66176916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432 (or 2430 counting only the distinct ones).

The product of its digits is 81648, while the sum is 42.

The square root of 66176916 is about 8134.9195447773. The cubic root of 66176916 is about 404.4847708206.

It can be divided in two parts, 661 and 76916, that added together give a palindrome (77577).

The spelling of 66176916 in words is "sixty-six million, one hundred seventy-six thousand, nine hundred sixteen".