66315044 has 6 divisors (see below), whose sum is σ = 116051334. Its totient is φ = 33157520.

The previous prime is 66315043. The next prime is 66315047. The reversal of 66315044 is 44051366.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 36481600 + 29833444 = 6040^2 + 5462^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66314998 and 66315016.

It is not an unprimeable number, because it can be changed into a prime (66315043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8289377 + ... + 8289384.

It is an arithmetic number, because the mean of its divisors is an integer number (19341889).

Almost surely, 2^66315044 is an apocalyptic number.

It is an amenable number.

66315044 is a deficient number, since it is larger than the sum of its proper divisors (49736290).

66315044 is a wasteful number, since it uses less digits than its factorization.

66315044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16578765 (or 16578763 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 66315044 is about 8143.4049389675. The cubic root of 66315044 is about 404.7659960006.

The spelling of 66315044 in words is "sixty-six million, three hundred fifteen thousand, forty-four".