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68660642 = 2191806859
BaseRepresentation
bin1000001011110…
…10110110100010
311210012022200202
410011322312202
5120034120032
610451345202
71462414541
oct405726642
9153168622
1068660642
1135836836
121abb2202
13112bcccb
149194158
156063d62

68660642 has 8 divisors (see below), whose sum is σ = 108411600. Its totient is φ = 32523444.

The previous prime is 68660617. The next prime is 68660677. The reversal of 68660642 is 24606686.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 1806859 = 68660642 / (6 + 8 + 6 + 6 + 0 + 6 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 68660596 and 68660605.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 903392 + ... + 903467.

It is an arithmetic number, because the mean of its divisors is an integer number (13551450).

Almost surely, 268660642 is an apocalyptic number.

68660642 is a deficient number, since it is larger than the sum of its proper divisors (39750958).

68660642 is a wasteful number, since it uses less digits than its factorization.

68660642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806880.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 68660642 is about 8286.1717336777. The cubic root of 68660642 is about 409.4830725062.

The spelling of 68660642 in words is "sixty-eight million, six hundred sixty thousand, six hundred forty-two".

Divisors: 1 2 19 38 1806859 3613718 34330321 68660642