67656465 has 40 divisors (see below), whose sum is σ = 122708520. Its totient is φ = 35659008.

The previous prime is 67656431. The next prime is 67656509. The reversal of 67656465 is 56465676.

It can be written as a sum of positive squares in 4 ways, for example, as 3207681 + 64448784 = 1791^2 + 8028^2 .

It is not a de Polignac number, because 67656465 - 2⁶ = 67656401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 67656465.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 35107 + ... + 36983.

It is an arithmetic number, because the mean of its divisors is an integer number (3067713).

Almost surely, 2^67656465 is an apocalyptic number.

It is an amenable number.

67656465 is a deficient number, since it is larger than the sum of its proper divisors (55052055).

67656465 is a wasteful number, since it uses less digits than its factorization.

67656465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1983 (or 1974 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The square root of 67656465 is about 8225.3550075361. The cubic root of 67656465 is about 407.4770007218.

It can be divided in two parts, 67656 and 465, that added together give a square (68121 = 261²).

The spelling of 67656465 in words is "sixty-seven million, six hundred fifty-six thousand, four hundred sixty-five".