68603661 has 48 divisors (see below), whose sum is σ = 122512000. Its totient is φ = 36111744.

The previous prime is 68603659. The next prime is 68603663. The reversal of 68603661 is 16630686.

It is an interprime number because it is at equal distance from previous prime (68603659) and next prime (68603663).

It is not a de Polignac number, because 68603661 - 2¹ = 68603659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68603663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43515 + ... + 45063.

Almost surely, 2^68603661 is an apocalyptic number.

It is an amenable number.

68603661 is a deficient number, since it is larger than the sum of its proper divisors (53908339).

68603661 is a wasteful number, since it uses less digits than its factorization.

68603661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618 (or 1615 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 68603661 is about 8282.7327012285. The cubic root of 68603661 is about 409.3697654168.

It can be divided in two parts, 68 and 603661, that added together give a square (603729 = 777²).

The spelling of 68603661 in words is "sixty-eight million, six hundred three thousand, six hundred sixty-one".