612665505 has 32 divisors (see below), whose sum is σ = 1114523520. Its totient is φ = 319152960.

The previous prime is 612665497. The next prime is 612665551. The reversal of 612665505 is 505566216.

It is a happy number.

It is not a de Polignac number, because 612665505 - 2³ = 612665497 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 612665505.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46966 + ... + 58575.

It is an arithmetic number, because the mean of its divisors is an integer number (34828860).

Almost surely, 2^612665505 is an apocalyptic number.

It is an amenable number.

612665505 is a deficient number, since it is larger than the sum of its proper divisors (501858015).

612665505 is a wasteful number, since it uses less digits than its factorization.

612665505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105598 (or 105592 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 612665505 is about 24752.0808216198. The cubic root of 612665505 is about 849.3261117815.

It can be divided in two parts, 6126 and 65505, that added together give a triangular number (71631 = T₃₇₈).

The spelling of 612665505 in words is "six hundred twelve million, six hundred sixty-five thousand, five hundred five".