68404661 has 8 divisors (see below), whose sum is σ = 74156544. Its totient is φ = 62722800.

The previous prime is 68404657. The next prime is 68404681. The reversal of 68404661 is 16640486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68404661 - 2² = 68404657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68404621) 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 7 ways as a sum of consecutive naturals, for example, 15461 + ... + 19386.

It is an arithmetic number, because the mean of its divisors is an integer number (9269568).

Almost surely, 2^68404661 is an apocalyptic number.

It is an amenable number.

68404661 is a deficient number, since it is larger than the sum of its proper divisors (5751883).

68404661 is a wasteful number, since it uses less digits than its factorization.

68404661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35011.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 68404661 is about 8270.7110335206. The cubic root of 68404661 is about 408.9735597433.

The spelling of 68404661 in words is "sixty-eight million, four hundred four thousand, six hundred sixty-one".